Indoor Grow Lights Beginner’s Guide: Everything You Need to Know

This post will investigate everything you need to know about selecting the best growing light system for your indoor growing needs.
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Are you planning on growing vegetables at home? Setting up a hydroponic or organic garden indoors is a great way to grow fresh veggies to feed your family this year.

Growing indoors means that you don’t have to concern yourself with changing weather conditions. Not to mention, the chances of pests and disease attacking your plants is much lower than in an outdoor garden.

However, growing indoors means that you’ll need to simulate the growing environment using technology. The most challenging part about growing indoors is finding the right grow light for your garden. There are plenty of benefits and uses for indoor grow light systems.

  • Grow your plants from seedling to harvest, without any sunlight
  • Start seedlings early before transplanting to the garden in early spring
  • Use specialized lighting systems for propagating and flowering
  • Finish outdoor plants that don’t have enough light left in the season
  • Propagate your plants and your root cuttings
  • Grow plants inside all year-round

These are a few examples of the benefits of using a grow light and indoor growing system for your vegetables this year. So, what is the best indoor grow lamp for your garden?

This post will investigate everything you need to know about selecting the best growing light system for your indoor growing needs.

Grow Lights – Vital Concepts

Before you settle on a grow light for your indoor garden, we need to go over a few concepts regarding how light affects plants and growth. Understanding these basic concepts will give you everything you need to choose the right lighting system.

The Light Spectrum

All light waves, both visible and invisible, fall somewhere on the spectrum. Science measures these wavelengths in nanometers, corresponding to the specific wavelength on the spectrum.

The light we’re interested in using for our indoor growing falls on the 400nm to 700nm spectrum. Light waves of this intensity are also known as Photosynthetically Active Radiation (PAR). PAR refers to specific wavelengths that plants use for photosynthesis processes to inspire growth.

Within this PAR bandwidth, there are wavelengths plants use for specific biological functions.

  • 400nm to 490nm – This wavelength produces blue light used by your plants during the vegetative state as they grow.
  • 580nm to 700nm – This “orange-red” wavelength mimics the sunlight in the later summer and early fall, signaling your plants to start fruiting.

For those that are math geniuses, you’re probably wondering why we skipped over the light waves in the 490nm to 580nm range. The chloroplasts in plant cells reflect light at these wavelengths since its mostly green in the 510nm to 570nm range.

Light Intensity

Now you understand PAR and the types of light required to boost growth and flowering in your plants. The next step is to understand how much of that light we need to use to grow healthy plants and increase harvest yield.

The amount of light produced by the light source reaching your plants refers to its “intensity.” The type of light plays a significant role in the intensity of the light waves. The positioning of your light also plays a vital role. The closer it is to the canopy, the shorter the distance to the light, and the more intense the light waves.

Therefore, the proper positioning of your grow light is critical. Too close to the canopy results in the burning of your crops. Having the light too far away from the canopy means that the plants don’t get the light they need for optimal photosynthesis.

Grow Light Power Consumption

Your grow light draws electricity to operate the ballast and bulb. Grow lights can vary in wattage, from as little as 50-watt NIR bulbs to 2,000-watt HPS or LED setups. Some growers use multiple lights in series, boosting the power capacity of their setup to meet the harvest needs.

Some lights have higher wattages than others. For example, LED lights have lower wattages than HPS or metal halide bulbs. Therefore, these light sources consume more power than LEDs, cutting down on the costs of operating your indoor garden.

Lighting Footprint

Each growing light has a specific design to cover a growing area. Trying to grow outside of this light footprint will produce lackluster results. The wattage of the bulb, and it’s operating height are the two most significant factors to consider when deciding on the right light footprint for your garden.

For example, a 1,000-watt globe operates at three to six feet above the canopy, and it’s suitable for a growing footprint of up to 3-square feet. When setting up your grow light, we recommend you follow the manufacturer’s guidelines for distance from the bulb to the canopy.

You can tweak these settings with small tests during your first harvest. It might take you the entire growing season to find the right setup for your garden. Finding the proper placement to provide optimal heat, intensity, and footprint takes some time and testing.

Plant Photoperiods

The photoperiod of your light refers to how much light you give your plants over 24-hours. If you’re growing outdoors, you have a limitation on the photoperiod, thanks to the sun. In the height of summer, you can get up to 12-hours of light each day, while the wintertime may shorten daylight to 6-hours.

When growing plants indoors, you can change the photoperiod to whatever length you desire. You can run a 24-hour photoperiod with consistent lighting if you want.

Some plants experience a change when they start to experience a shortening in the photoperiod window. This shortening of the photoperiod mimics the days of the harvest season, and the plants begin to flower.

Best Selling Indoor Grow Lights

Bestseller No. 1
EZORKAS Grow Light, 80W Tri Head Timing 80 LED 9 Dimmable Levels Plant Grow Lights for Indoor Plants with Red Blue Spectrum, Adjustable Gooseneck, 3 9 12H Timer, 3 Switch Modes
  • [AUTO TURN ON/OFF & TIMING FUNCTION]: Our Grow Light is the latest in plant growth lamps with an automatic timing function and a USB plug (comes with AC adapter). Not only can you set it up for lighting every 3 hours, 9 hours or 12 hours, but you can also adjust the brightness of the light and the distance between the light and plants, according to plant needs.
  • [EFFICIENT RED/BLUE LED COMBINATION]: This LED lamp has grow lights made up of 80 efficient growing LEDs (52 red and 28 blue). It meets the conditions of plant growth without sunlight. The red light promotes photosynthesis, germination, bloom and fruit bearing. The blue light ensures the plants take in more energy through chlorophyll synthesis to help in germination.
  • [9 DIMMABLE MODES & 3 SWITCH MODES]: Our grow lamps provides 9 dimmable modes and 3 spectrum modes to suit varied stages of plant growth. It has 9 levels of light intensity and has 3 spectral modes (red, blue, and mixed light) to meet different stages of plant-growing needs.
  • [VISIBLE QUALITY AND ADJUSTABLE]: The lamp’s LED grow lights have a USB connector which makes it convenient to connect in your office or home to USB or AC power plug (includes adapter). The 4-head light has a 360-degree flexible gooseneck made from quality tubing to keep a fixed position. The metal clamp allows the lamp to be placed anywhere in your home or office.
  • [WIDELY USED]: Our grow lamp is suitable for indoor potted plants or an indoor garden. It accelerates the growth of various types of plants in every stage of development.
Bestseller No. 2
Plant Grow Light, VOGEK LED Growing Light Full Spectrum for Indoor Plants with Timer, Plant Growing Lamps for Seedlings with Adjustable Gooseneck & Desk Clip On, 3 Switch Modes 10 Brightness Settings
  • Timing Function & Auto On/Off: Grow light is very useful and convenient. It can be timed to 3, 6, 12 hours as the plant needs, bringing enough but suitable brightness to your plant. With auto on/off function, there is no worry about plant withering when nobody at home. Plant light will be restarted automatically the next day without manual operation.
  • 3 Switch Modes & 10 Brightness Settings: LED growing lamp can provide 10 brightness level from 10% to 100% by pressing plus button or minus button. You also can choose one, two or three lamps on. If you are longing for beautiful plants, the only one you need is owning a plant growing light that can apply for whole growth circle of different plants. Please note the whole grow light is 72W in total and 24W per bulb.
  • Strong Clip & Adjustable Gooseneck: The 3-head grow light has a strong clip that can be stably and arbitrarily clamped on anywhere, and 3 bendable gooseneck between the clip and the lights which you can move the light accurately to the position you need. With those features, you can use it in anywhere indoor you want, such as bedroom, living room,study, private garden.
  • Great Efficiency & Friendly Environment: Grow light can offer full spectrum from 380 up to 800nm from which plant can absorb all lights it needs. It is important for plant to grow better. This grow lamp can meet needs of various of plant growth. The plant bulbs are replaceable, so you can replace new bulb instead of buying a new light when the life time of bulb is end. This design is friendly to environment.
  • Unique Advantages: Comparing with other similar products. Our plant growing light is made of 144LED beads, which can provide strongand uniform intensity of light to plants. This Grow lamp has more larger lighting area that is suitable for whole growth circle.
Bestseller No. 3
Grow Light for Indoor Plants - Upgraded Version 80 LED Lamps with Full Spectrum & Red Blue Spectrum, 3/9/12H Timer, 10 Dimmable Level, Adjustable Gooseneck,3 Switch Modes
  • EFFICIENT LED COMBINATION: This LED lamp has grow lights made up of 80 efficient growing LEDs (36 red, 16 blue and 28 full spectrum). It meets the conditions of plant growth without sunlight. 1--FULL SPECTRUM(380nm-800nm): Suitable for all plants to root and sprout. 2--RED(660nm)+BLUE(460nm) SPECTRUM : for blooming and fruits. 3--RED+BLUE+FULL SPECTRUM: A mix of Red+Blue+Warm White is best to fuel the growth of your plants.
  • UPGRADED AUTO ON/OFF TIMER: Plant grow lights come with the circular memory timer function allows to automatically turn on/off every day according to your settings: 3H(Blue)/9H(Green)/12H(Red). Which requires no manual operation and takes good care of your plants when you on work or vacation.
  • 10 DIMMABLE MODES: Our grow lamps provides 10 dimmable modes to suit varied stages of plant growth. It has 10 levels of light intensity and has 3 spectral modes to meet different stages of plant-growing needs.
  • VISIBLE QUALITY AND ADJUSTABLE: The LED grow lights have a USB connector which makes it convenient to connect in your office or home to USB or AC power plug (includes adapter). The 4-head light has a 360-degree flexible gooseneck made from quality tubing to keep a fixed position. The metal clamp allows the lamp to be placed anywhere in your home or office.
  • SCIENTIFIC HEAT DISSIPATION DESIGN: Indoor LED grow light is backed by an aviation-grade heat sink powered by a temperature control unit. This improved heat sink efficiently dissipates the heat generated by the lamp to the atmosphere.
Bestseller No. 4
Grow Light, 4 Head Plant Grow Lights for Indoor Plants Full Spectrum, Led Plant Light Grow Lamp with Auto 3/9/12H Timer, 3 Lighting Modes, 10 Level Brightness for Indoor Plants Succulent Veg Flower
  • 🌿【2020 EFFICIENT RED/BLUE/WHITE LED COMBINATION】Maliton 2020 upgraded 4-head plant light eqquiped with high power 80 led chip (36 Red+16 Blue+28 full spectrum). An ideal for all sorts of indoor plants at all growth stages. Unlike those single red and blue grow light on the market, we specially designed combination of Full spectrum modes, which is the most top lighting solution for your indoor plants
  • 🌷【AUTO TURN ON/OFF & TIMING FUNCTION】The grow lights for indoor plants offers cycling timer feature with 3 Timing Options- 3h/9h/12h lighting time everyday. Auto on/off and no more manually operation everyday
  • 🌾【3 Color Modes & 10-Level Brightness】The indoor grow lights have 3 light modes: ① Red+Blue only (promotes photosynthesis, germination, bloom results) ②Full Spectrum only(similar to the natural sunlight), and a combination of both:③ Red+Blue+Full spectrum(on the basic of sunlight, increase red and blue light). Lets you can choose the most suitable modes light during their various growing stages. This grow lamp also comes with 10-level brightness can be adjust according to your plants needs
  • 🌺【Strong Clip & Adjustable Gooseneck】The 4-head full spectrum plant light built in a strong sturdy clip that allows it to be clamped to various surfaces. And comes with 360 degree adjustable gooseneck design that allow you to point them in any direction you wish. The long size goose neck help light cover a larger area to enhance plants growth
  • 🌻【WIDELY USED】It also features a USB connector so the lights can be charged from an adaptor, a computer or laptop, or a power bank. The plant lamp is widely applied to Hydroponics, family gardening, officepotted plants, greenhouse seedling, flower show and others, get it now! 【NO RISK PURCHASE 】We promises to full refund 100% MONEY BACK GUARANTEE for this product if you are not satisfied with it even if it is over Amazon's 30 days refund/return period.
Bestseller No. 5
LED Grow Lights for Indoor Plants, JUEYINGBAILI 80W Full Spectrum Plant Lights with Auto ON/Off 3/9/12H Timer, 9 Dimmable Brightness for Indoor Succulent Plants Growth
  • 🌻Upgraded Four Heads Plant Grow Light - We designed this Newest Grow Light with four goose necks not only solved the trouble of setup and inflexibility of traditional hanging grow light but also provides a much wider coverage area than clip grow light with two or three arms. The coverage area with one head is roughly 24-27 inches depending on the height you have the head aimed.
  • 🌻Natural Sun Light Required by Plants - Based on the type and output of light (PAR) needed to support photosynthesis, we manufactured this LED Grow Lights with 3 color modes(Red Light, Blue Light & Mixed Light) and 9 brightness settings ranging from 20% to 100%, which effectively supplemented the lack of natural sunlight and promoted the growth of plants at all stages.
  • 🌻Intelligent Timing Function & High Quality LED Circuits - This grow light with the circular-memory time function allows to automatically turn on/off every day according to your settings, which requires no manual operation and takes good care of your plants when you are on work or a vacation. The LED Bulbs made of aviation aluminum heat conductive material greatly extended the longevity more than 50,000 hours and provides steady current without flickering, melting or burning.
  • 🌻360-Degree Adjustable Goose Necks & Easy to Use - Powered by USB or AC Power Plug(USB power adapter included ), it’s portable and convenient to use at home or in the office. The goose necks can be rotated 360 degrees so you can control the angle easily and the distance between the lamp and plants.
  • 🌻24 Months Warranty - This grow light applies to indoor potted plants, leaf cuttings, greenhouse vegetables etc. It comes with added bonus, ‘a spade, rake and shovel’. We stand behind our Product Quality! if you have any issues with your purchase in 12 Months, please email us to get a full refund or a replacement.

What are the Types of Indoor Grow Lights?

Now that you understand the basics of indoor lighting, it’s time to discuss the types of grow lights available. This topic is confusing for many indoor gardening newbies. Understanding the difference between the lights helps you choose the right light to match your needs.


Fluorescent bulbs are a popular choice for starter gardens. The blue-white spectrum of the light is ideal for starting seedlings and growing young plants. Best of all, these fluorescent globes are cheap to run, using hardly any electricity.

CFL bulbs are an excellent choice for vegetative gardens, and there’s no chance of this light spectrum burning your plants. You can leave the bulbs within a few inches of the top of the canopy, and the tips of your young plants won’t burn.

The CFL bulbs don’t put out much heat, and if the leaves of your plants touch the lamps, it won’t result in a burn. Both commercial and hobbyist farmers use fluorescents to start plants before moving them into the flowering phase.

Some plants, such as leafy greens like spinach and kale will do well under these lights, and they don’t require any transition to another light source for additional growth. T5 bulbs are the most popular type of CFL bulb available.

You’ll need several of these lights over one growing area, and we recommend packing in as many as you can fit.

Light Emitting Diode (LED)

LED grow lights are the new gold-standard in indoor growing. These lights were the next evolution from the high-pressure sodium and metal halide globes. However, LED costs a fraction of the price to operate when compared to HPS and MH globes. LEDs produce less heat and consume less electricity.

The early stages of LED technology were skeptical, and many growers were hesitant to use them due to the technology’s unproven nature. However, over the last 10-years, LED technology has made remarkable progress, and todays LED lighting systems are as effective as HPS or MH, without the sizable energy bill.

Some LED models also feature dual-spectrum output. You can start your plants on a vegetative light spectrum, and they turn them to flowering with the click of a switch. These lights are typically more expensive, but the dual operation comes in handy.

Bestseller No. 1
LED Grow Lights, Full Spectrum Panel Grow Lamp with IR & UV LED Plant Lights for Indoor Plants,Micro Greens,Clones,Succulents,Seedlings
  • 🌻 Full Spectrum Plant Light - equipped with 75 High-power LED chips:47 Red 19Blue 3UV 3IR 3White.NOTE :The UV and IR LEDs are particularly DIM,but it is normal.PANEL SIZE: 12.2 * 4.7 *1.2 inches
  • 🌻 Wide Uses - this plant grow light can be used for both hydroponics and indoor plants in soil,mainly used for small plants,mirco-greens, and perfect for you to add as a supplemental side panel during bloom.
  • 🌻 Easy Set-up - updated hanging kits make this fluorescent lights much more easy to assemble. With good heat dissipation and strength ABS material body ensures your panel more durable and long-lasting. Lighting Cover: Max 1.2x3ft at 2ft height;Recommend Height: 8-30 inch.
  • 🌻 Highly Efficient - as for LED power draw this seedling light is highly efficient.Estimately monthly cost roughly $3 in electricity (12 hours a day). Not a bad investment if you growing some small plants.
  • 🔥What Will You Get - we take pride in delivering top quality products and offering our friendly 12 Months Warranty plus 30 Days Money Back Guarantee for any reason. You can contact our 24 hours available customer service through clicking "Sold by" on the product detail page or your Amazon order page and you will be directed to "Ask a question" to send us message.
Bestseller No. 2
Giixer 1000W LED Grow Light, Dual Switch & Dual Chips Full Spectrum LED Grow Light Hydroponic Indoor Plants Veg and Flower-1000 wattt ( 10W LEDs 100Pcs)
  • New Upgrades: Compare with the traditional 1000 watt grow lamps, this new Dual-Chips 10w led lights is bigger, brighter and efficient, but consuming only 110 watts.
  • Perfectly help you to save the energy and improve the environment of plant growing. DOUBLE SWITCH- Veg and Bloom button have different function. Veg switch: It's blue led and white led. For seeding or young vegetative growth,you can use Veg switch only. Bloom switch: It's red led and white led.for flowering/blooming,you can use both Veg and Bloom switches.
  • Most LED lights are rated at somewhere 50000 hours of use. For comparison, many other grow lights tend to last for around 20,000 hours before needing to be replaced.Protecting diodes are added to make sure one chip out, others still work.
  • Full spectrum: the light include red,blue,yellow,white,and so on etc. which is similar to the sunshine,ideal for all kinds of indoor plants veg and flower at all growth stages.
  • 【Warranty and Customer Service】24 monthes quality guarantee and 30 days refund

Metal Halide (MH)

MH lighting is a favorite choice for indoor gardeners during the vegetative phase. This light produces the growing spectrum, providing plenty of power and intensity to supercharge the growing period.

However, these lights consume plenty of power, making them an inferior choice to CFL in terms of value for money. MH produces the blue light plants that need to grow, and they are suitable for wattages up to 2,000-W

High-Pressure Sodium (HPS)

The HPS bulb produces light in the red range between 600nm to 700nm. This spectrum mimics the waning days of summer and spring, and the daylight hours start to get smaller. If you’re growing vegetables that rely on changes to photoperiods to flower, turning on your HPS bulb after the vegetation cycle will induce flowering.

These lights push out plenty of heat, and you’ll need an external ballast you can set up outside the growing area to keep the temperature down. HPS is an intense light and comes in power ranges from 400-watts to 2,000-watts.

These bulbs are notoriously expensive to run. Many growers decided to leave their HPS systems in favor of LEDs in recent years.

Bestseller No. 1
VIVOSUN Hydroponic 1000 Watt HPS Grow Light Air Cooled Reflector Kit - Easy to Set up, High Stability & Compatibility (Enhanced Version)
  • Buyers must peel off the inner blue protective film before using; 6" Air Cooled Reflector: Over 90% high reflectivity aluminum ensures soonest flourish of your plants
  • UL Listed 1000W Dimmable Ballast: Runs on 120~240V power supply, comes with 8ft 120V power cord, 600w/750w/1000w/super lumens optional
  • HPS Grow Light Bulbs: High PAR value (Photosynthetically Active Radiation), Superior quality & optimized spectrum to promote growth
  • 24-Hour Mechanical Timer: 15-minute On/Off, 24 hours settings; 125V, 15A, 60Hz, 1/2HP, 1875W Heavy duty construction; Timer mode can be turned off
  • US Patented 1/8" Rope Hanger (1 Pair): 8-ft long & 150lbs/pair weight capacity, solid braided polypropylene rope & reinforced metal internal gears to ensure top-safety
Bestseller No. 2
iPower 600 Watt HPS MH Digital Dimmable Grow Light System Kits Wing Reflector Set with Timer
  • 600W Digital Dimmable Electronic Ballast: Support 120V/240V Input; Dimmable Options: 50%, 75%, 100%; 8 Feet heavy-duty power cord included; Stable power output ensure flicker free light
  • 1 x 600W Super HPS Bulb 2100K; 1 x 600W MH Bulb 6000K; Optimized spectrum and high PAR (Photosynthetic Active Radiation) to promote healthy plant growth and soonest flourish
  • 1 x Pair of 8-ft adjustable Ratchet Clip Hanger Rope: hold up to 150 lbs; 24-hour Plug-in Mechanical Timer: 15 minutes increments
  • 19-inch Wing Reflector: up to 4' x 4' light coverage; Built-in 15 feet heavy duty lamp cord with E39 Ceramic Mogul Socket and standard Hydroponic S-Plug; highly 95% reflective textured German aluminum maximizes the light reflected to the plants
  • CAUTION: This system will generate too much heat to be used in an enclosed area without ventilation. Adequate ventilation is required for all iPower grow light systems. We recommend the use of an iPower inline fan

Ceramic Metal Halide (CMH)

These globes offer indoor growers the best of HPS, and MH roiled into one platform. These lights have a balanced spectral output, providing a mixture of red, orange, and blue light. As a result, you can grow with one bulb year-round without the need to switch to different spectrums.


Plasma bulbs are the new evolution of LED. These systems are gaining traction with growers due to the efficiency claims around the power consumption of these models. They offer the same one-size-fits-all growing spectrum, but they are considerably more expensive to purchase than most LED systems.

Bestseller No. 1
Phlizon CREE Cob Series 2000W LED Plant Grow Light Full Spectrum Indoor Plants Light Growing Veg Flower Cree Cob Grow Light with Monitor Adjustable Rope -2000W (Actual Power 400watt)
  • CREE COB LEDS- CREE COB is known for high power and stability. CREE COB, higher brightness, smaller thermal resistance, less light attenuation and longer life.CREE COB itself is a full spectrum design with high PPFD value which can promote faster and better plant growth
  • EXTREMELY HIGH PPFD- PPFD, Photosynthetic Photon Flux Density,Hanging at 18", the PPFD is 941 umol/m²s. The bigger the density, the higher the value, the better the plant. COB LED has highest PPFD output. COB LED is much brighter and more efficient than traditional LEDs.
  • FULL SPECTRUM- The CREE COB LED itself is a full spectrum lamp integrated design bead. We have added additional light beads in various bands to ensure the scientific full spectrum. It contains 4pcs COB, 68pcs 630-660nm, 10pcs 470nm, 6pcs 6500k, 4pcs 3000K, 4pcs UV, 4pcs IR
  • MAXIMUM ENERGY SAVING- The actual power is 400watt. Best hang height at 24",Core Coverage area at 47"*47"(3.9*3.9ft). Maximum coverage area at 49"*49"(4.1*4.1ft). It is more scientifically and energy-efficient than HPS HID and MH. It serves both herb/veg/bloom and is convinient for you.
  • BEST SERVICE- We are a professional LED light manufacturer with strong R&D team and many light tester. 2 years warranty plus 30 days money back guarantee. If you have any problems, please feel free to contact us. We will provide you with completely satisfing reply.
Bestseller No. 2
(2) Light Rail 4.0 AdjustaDrive Kits Motor with Rail, Robotic Grow Light Mover Genuine Solidly Made in USA
  • Much better yields when our grow lights move because more leaf area is reached with better light, so no hot spots and no shadow patterns. Plus we cover about 30% more area, and that’s per grow light. See LightRail ppfd chart below sponsored products.
  • (2) LightRail 4.0 AdjustaDrive Kits complete, each with AdjustaDrive Robotic Motor, two-piece 2 meter (6ft6in) Rail, hdw and instr: Plus adjustable speed and time delay. LightRail 4.0 has adaptable 110-220 volt compatibility so works in US, Canada, Europe and elsewhere.
  • Only LightRail performs over many years like a workhorse with the power and endurance for any grow light weight. Beware of cheaply made imitations.
  • Genuine LightRail, the one that meets important guidelines (see below) and solidly made in the USA since 1986. Manufactured by Gualala Robotics.
  • If it does not have the LightRail logo, see Motor photo, it is not a LightRail. Keep it Real, Keep it LightRail.

Cooling and Heating Effects

One of the byproducts of running indoor growing lights – is heat. CFL bulbs and LEDs put out very little heat during operation. As a result, you’re not going to notice any changes in your indoor growing temperatures.

However, MH and HPS bulbs do produce significant amounts of heat. As a result of the light intensity produced by these bulbs, you might notice that the temperature inside your growing room may increase by up to 12-degrees. The increase depends on the size of the lamp and your growing conditions.

To mitigate this effect, you’ll have to install fans or an air-conditioner to lower the heat back to reasonable growing temperatures.

How Do You Maintain Your Grow Lights?

There are a few basic principles you can follow to maintain your lights. In most cases, the ballasts will only require some minor cleaning, and you might have to open the ballast once a year to blow out the dust.

Watch Out for Bulb Light Degradation

All grow bulbs will start to lose efficiency and power over time. A degraded bulb doesn’t produce the necessary amount of light to create the best crop effects. As a result, you’ll need to swap out bulbs at least once a season to prevent degradation.

However, different types of bulbs provide different service life, depending on the type, wattage, manufacturer, and use in the garden.

T5 Fluorescent Bulb Degradation

Fluorescent light degrades the slowest out of all the options you have. These bulbs will lose around 10% of lumen capacity for every 20,000-hours of working time.

LED Bulb Degradation

LEDs degrade the slowest. For example, an incandescent bulb using filament, lasts for around 6 to 9-months, depending on your frequency of use. In contrast, a LED will last you between 15 and 20-years.

Most manufacturers will rate LED systems at 50,000 to 100,000-hours of operation before the diodes require replacement.

When Do I Replace My Bulbs?

You’ll have to replace your bulbs sooner or later, and we recommend sooner than later. Replace MH and HPS bulbs after they reach 50% degradation – we recommend after each harvest season, or every 8 to 10-months.

Indoor Grow Light FAQs

Do you have a few more questions about using indoor grow lights? Check out this FAQ for the answers you need.

How much light do indoor plants need to thrive?

Some plants are different than others. We recommend you run your lights for 16 to 20-hours on vegetative crops. You can use an MH or CFL bulb for this purpose. If you’re flowering vegetables or fruits, you’ll need to drop the photoperiod to 12-hours on, and 12-hours off.

Try to avoid running your lights for 24-hours; plants need time to rest and recover – just like you. We recommend you buy a timer and link it to your lighting system. You can use the controller to nominate your lighting hours, without the need for manual intervention.

How close can fluorescent bulbs come to my plants?

CFL bulbs won’t damage your plants. Even if the foliage ends up sitting on the lamp directly, you shouldn’t notice any burning or damage to the leaves or flowers of your plants. However, we recommend that you always keep the lights around 2 to 3-inches away from the top of the canopy.

Don’t move them any higher than that, or you’ll start to experience a slowdown in your plants’ growth. As mentioned, change your CFL bulbs at least once a year to avoid bulb degradation and keep your garden thriving.

How often must I replace HID lighting like HPS and MH bulbs?

It depends on how often you use the light and the duration of the photoperiod you’re trying to emulate. As a good rule of thumb, we recommend replacing MH and HPS bulbs after each season for the best results.

HPS and MH bulbs are expensive, so you’ll need to account for the costs of the bulbs in your gardening budget. Ceramic metal halide bulbs last a bit longer than the other HPS and MH variants. You might get away with two growing seasons before you notice severe bulb degradation occurring.

Is growing under LEDs worth it?

Many indoor gardeners swear by LED systems, while others steer clear of this tech. When selecting your LED grow light, make sure you look at the PAR, lumens, and the wattage of the light before finalizing your purchase.

Follow the directions and guidelines for growing under these lights, placing the light too close to the canopy results in the burning of the plants. For seedlings and sprouts, we recommend you keep the light at least 24″ to 28″ above the canopy. You can drop the lights to 18-24″ overhead during the transition phase, and 12″ to 18″ during the flowering cycle.

Wrapping Up – Get Professional Advice

If you’re thinking about starting an indoor garden this year, you need to get the best advice possible. We recommend signing up for a forum.

You’ll find plenty of experienced growers willing to give you some advice. Get recommendations on the best equipment brands and avoid making the same mistake novice gardeners make in their first season.

There are dozens of grow lights out there to choose from. However, only a select few provide the best light for your garden. Make sure you select a device that suits your gardening needs and your budget.

Hollie Carter

Hollie is a life-long gardener, having started helping her Dad work on their yard when she was just 5. Since then she has gone on to develop a passion for growing vegetables & fruit in her garden. She has an affinity with nature and loves to share her knowledge gained over a lifetime with readers online. Hollie has written for a number of publications and is now the resident garden blogger here at GardenBeast. Contact her at hollie@gardenbeast.com or follow on twitter https://twitter.com/greenholliec

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