Best 400W LED Grow Light Review

So, when choosing a 400W grow light for your indoor cannabis garden, you have settled upon using an LED grow light. Generally, LEDs are very powerful, with the ability to produce excellent yields when used in the right way. A 400 Watt LED grow light unit can provide a footprint coverage of about 3ft by 3ft.

400W LED Grow Light

The range may be different depending on the growth phase. You have the option of increasing the coverage area by using more than one grow light. We have identified four of the best 400W grow lights that you can use in your cannabis garden.

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Our Top Picks Best 400W LED Grow Lights

ECRU LED Grow Light Twin Panel – 400W Equivalent Growing Lamp

ECRU LED Grow Light Twin Panel - 400W Equivalent Growing Lamp (2 Pack x 200W) with White, Blue and Red LED Diodes Light Bulb for Indoor Plant Seedling, Vegetation and Flowering

Grow lamp that you should highly consider when choosing an LED lamp for your indoor farm is the ECRU LED Grow Light Twin Panel 400W Equivalent Growing Lamp. It is highly efficient due to its superior LED chips.

The chips have diodes that are larger and brighter than that of the standard LED chip. The PAR and lumen value of the grow light is, therefore, 20 percent more than that of regular LEDs. The light can readily replace a traditional 150Watt HPS/MH lamp while using a power of only 27 watts.

It, therefore, helps you save plenty of energy. The light panel contains 48 LEDs that consist of red, blue, and magenta lights. The LEDs produce a sun-like spectrum that is perfect for use throughout all the growth stages of your plants. The light spectrum contains cool white, red, blue, and UV lights.

The lights help your plants grow and develop through the seedling, vegetative, flowering, and harvesting stage. It removes the need for switching the grow light through the different stages. They are especially beneficial when growing your clones without the need of changing lights.

The lamp has an arm that can rotate to 180 degrees. After you install the lamp above your plants, you can turn it to a manner that can give your plants adequate light.

Pros 

  • The grow light is lightweight and very easy to install as it comes with various installation methods and a guide to help you set it up.
  • You can use the light throughout all the stages of growth without the need to change it
  • It provides a full spectrum light with a warm and cool white light that closely resembles the sun
  • It has two LED panels that provide a greater light coverage for your plants
  • It is highly efficient and energy saving
  • The light ensures that your harvest is of high yields
  • You can use it to grow various types of plants
  • It has a flexible arm that allows you to install the light in different positions

Cons 

  • The grow light is too bright to look at with bare eyes.

California Light Works SolarXtreme 400 LED Grow Light Fixture

California Light Works SolarXtreme 500 LED Grow Light Fixture - Full Spectrum 400w Watt COB Lighting System - 120V Volt - Lightworks

One of the top quality LED lights you can use in your grow farm are those that use COB chips. And one that will never fail you is the California Light Works SolarXtreme 500 LED Grow Light Fixture. It should be the first choice for any cannabis grower that only wants to get the best yields without messing around.

The grow light contains 8 COBs, each using 50 watts to produce a full spectrum light. It emits an intense white light that is effective for use in all the growth stages of your cannabis plants.

The grow light provides you with coverage of 5ft by 5ft during the vegetative period and 4ft by 4ft during the flowering phase. The grow light features two huge fans and a large heat sink that helps to reduce the heat produced by the COB LEDs.

Pros 

  • The lamp produces a full spectrum light that facilitates the growth of your plants through all the stages of growth
  • It is energy efficient and at a lower cost than that from regular LED grow lights.
  • The grow light can provide coverage of 4ft by 4ft.
  • The lamp is easy to install and start using.
  • The grow lamp comes with a one year warranty

Cons 

  • The grow light produces a lot of heat, necessitating you to have an effective ventilation system in your grow tent.

MARS HYDRO 400W LED Grow Light; Full Spectrum Grow Lamp

MarsHydro LED Grow Light 300W Full Spectrum for Hydroponic Indoor Plants Growing Veg and Flower Daisy Chain ECO 300W

Everyone wants to get the best results from their cannabis plants, a bountiful harvest. To achieve it, you need to provide your plants with a top-quality light spectrum. Few grow lights can compete with the MARS HYDRO 400W LED Grow Light when it comes to producing a high quality light.

The lamp gives a red and blue spectrum light that is of top quality at a low operating cost. It makes use of Epistar chips together with its improved reflector cup design to provide a 100 percent output. The chips have a parallel connection that ensures the failure of one chip does not affect the whole light.

The light penetrates deep into your plant’s canopy. The lamp produces a similar output to a 250-watt HPS/MH grow lamp providing coverage of 3.5 ft by 3.5 ft during the vegetative stage and 2ft by 2 ft for the flowering phase. It comes with aluminum heat sinks and two fans that help to reduce the excess heat produced by the light.

Pros 

  • The grow light provides your plants with a full spectrum light
  • The lamp has a long lifespan of 50,000 hours
  • It comes with a veg and flowering switch to help switch the light according to the growing phase
  • It has an inbuilt cooling system that helps to reduce the heat production

Cons 

  • The light is too bright for the eyes.

Hipargero 400W COB LED Grow Lights Fixture Full Spectrum

hipargero LED Grow Light - 1200W COB LED Grow Lights Full Spectrum with UV IR 3000K COBs 3W Osram Chips for Indoor Plants Veg Flower Lighting

LED lights are one of the costly grow lights you can purchase today. However, the Hipargero 400W COB LED Grow Lights Fixture is one of the cost-effective lights providing top quality light for your plants.

The grow light produces a full spectrum light ranging from 380nm to 730nm consisting of red and blue LEDs. The lamp uses top quality Osram LEDs and High Power Epileds COBs that do not burn out like other LEDs that do not last for long. The grow light can readily replace a 300-watt HPS/MH grow light when using a power of only 120 watts.

The lamp can provide your plants with a covering of 2ft by 2 ft when you place it 18 inches above the plants. When you have a small indoors garden, two of this light fixture are enough to provide your plants with the right amount of light to grow effectively.

It has an inbuilt cooling system consisting of powerful high-speed fans and a built-in aluminum heat sink. It also has an aircraft-grade iron shell that helps transfer heat from the LEDs to the outside of the lamp. By doing so, it helps to extend the service of the grow light by a few more months. You cannot use this lamp outdoors or in a humid environment since it is not waterproof. It comes with a one year warranty as well as a 30-day money-back guarantee.

Pros 

  • The lamp provides a full spectrum light to your plants with a higher PPFD than other grow lights.
  • It is energy-saving and more effective than other similar grow lights.
  • It provides coverage that is better than that of a reflector series
  • The grow light has a powerful cooling system that helps to get rid of heat and extend the life of the LED bulbs.
  • You can use it through all the growth stages without switching it out with another light
  • It has a long lifespan of about 50,000 hours
  • The lamp is simple to install and use

Cons 

  • The grow light is not waterproof
  • It is incredibly bright and may burn your eyes when you look at it directly

Summing up

One of the factors that you need to consider when choosing a grow light to use should be the wattage of the unit. Your grow light wattage will determine the size of your coverage area and how the light will affect the various cannabis grow stages.

A 400w grow light is highly efficient and does not consume a lot of power. It provides a sizeable coverage that you can increase by using more than one grow light in your grow tent. When growing cannabis, you need to get a lamp that will provide you with a full spectrum light.

It reduces the need for using more than one light in your grow room, saving you unnecessary costs. The light as well needs to be the right spectrum for each growth stage if you want to get the best yields.

Without meeting the precise requirements for your cannabis farm, you are setting up your plants to experience failure. We hope that the above 400W LED grow lights will make your job of choosing the right grow lamp for your farm.

Bestseller No. 1
Grow Lights for Indoor Plants,400W(4x100W) All Spectrum Plant Grow Light,Flexible 4 Heads Led Grow Lights with Adjustable Stand,Standing Floor Grow Lamp with Plug for Indoor Plants Succulents
26 Reviews on Amazon
Grow Lights for Indoor Plants,400W(4x100W) All Spectrum Plant Grow Light,Flexible 4 Heads Led Grow Lights with Adjustable Stand,Standing Floor Grow Lamp with Plug for Indoor Plants Succulents
  • 🌱【JUST LIKE REAL SUNLIGHT】: Worried your indoor plants aren't getting enough sunlight? Not anymore! This LED grow light delivers full spectrum light with all the wavelengths of light between 380nm - 800nm to simulate natural sunlight! This indoor plants grow light promotes photosynthesis, accelerates sprouting, bloom, and fruiting while promoting overall plant health.
  • 🌱【EASY TO INSTALL&ADJUST HEIGHT】:Using the adjustable tripod you can place this grow lamp in your home, office,green house and anywhere else you want. The flexible goose neck is longer, thicker and offers 360 Degree Rotation. The adjustable tripod can be retracted 15-78 inches, and the power cord is 78 inches, which is twice the length of other upright grow lights, and is especially suitable for tall plants.
  • 🌱【FOR ALL INDOOR PLANTS】: Whether you're growing some herbs or just common house plants, you can count on our grow lights for indoor plants. Thanks to the high brightness of a single lamp of 100W can provide strong and uniform light intensity for plants.Suitable for flowers, succulents, cacti, bonsai, microgreens, vegetables, tomatoes, peppers, etc.
  • 🌱【STRONG AND STURDY】:Our indoor grow lights feature a premium aluminum housing. Both the light guide plate and the heat dissipation plate have openings, and the good heat dissipation makes the plant lamp beads have a longer life, and the use time exceeds 50,000 hours.Removable LED grow light that can be used in a variety of places such as bedrooms, basements, kitchens, home office shops and mini greenhouses, quiet and noise-free.
  • 🌱【QUALITY AND APPLICATION】:★ Delivery from US warehouse, usually within 3-7 days ★ We provide professional customer service,if you have any problems, please feel free to contact us.The grow light is suitable for indoor potted plants or indoor gardens. It can accelerate the growth of various plants at various developmental stages.
-$3.00 SALE OFFBestseller No. 2
Grow Lights for Indoor Plants,Engilen 400W Full Spectrumg Grow Light ,3 Types Dimmable, Remote Control,Suitable for Indoor Plants,Micro Greens,Clones,Succulents,Seedlings.
59 Reviews on Amazon
Grow Lights for Indoor Plants,Engilen 400W Full Spectrumg Grow Light ,3 Types Dimmable, Remote Control,Suitable for Indoor Plants,Micro Greens,Clones,Succulents,Seedlings.
  • 【Energy efficient 】: 60w actual power replace 400W HPS or HID grow light with only 60W consumption, saving your electric bill,Real working environment test, wet environment, it can work normally even in a water tank, improving the safety factor
  • 【Dimming function】: Contains three lighting modes: red + warm white, purple + white, red + purple + white + warm white, Providing the most suitable and most needed light for each growth stage of the plant.
  • 【Cycle timing switch design】: The plant light has a cycle timing function4h/8h/12h. 4 kinds of brightness adjustment, adjust the full spectrum grow light brightness according to your plant needs.
  • 【Indoor grow light】: Engilen full spectrum led grow light, It emits all the wavelengths from 380nm to 800nm- just like natural sunlight. The plant lamp emits growth light through the lamp bead chip, which completely imitates natural light, include 60 warm white LED、60 white LED、20 red LED、4 purple LED.
  • 【Widely Used and easy install】:Widely apply to family balcony seeding/breeding, gardening, flowering, potted plants, grow tent,outdoor garden especially tall and large plants.The lamp was rather straightforward to put together, it has a handle as well as metal hanging threads that connect to a clip, allowing it to be hung almost anyplace with relative ease.
Bestseller No. 3
KUAREZ RD4000 Led Grow Light Dimmable Grow Light Sunlike Full Spectrum Grow Lamp for Indoor Plants with Samsung Chips & MeanWell Driver
474 Reviews on Amazon
KUAREZ RD4000 Led Grow Light Dimmable Grow Light Sunlike Full Spectrum Grow Lamp for Indoor Plants with Samsung Chips & MeanWell Driver
  • UNIQUE DESIGN: The upgraded Samsung led grow light comes with remote to control unlimited grow lamps within 82FT(25m). 10 levels precise dimming to meet the brightness your plants need in different stages easily. Multi-light in different/same watts can be added in same group. 5 groups selection allows to control lamps from different area separately or together easily. Make the planting easier and more intelligent.
  • HIGH EFFICIENCY & COST SAVING: The 4000 dimmable plant lights full spectrum uses Samsung leds, creates better canopy light penetration with PPE 2.7 μmol/J, helps maximum higher yields of indoor plants. Consuming only 425W, running 50% less power than the HPS or Blurple lamps or other SMD LEDs to save the cost but getting higher yields. Ideal to cover 5' x 5' veg stage at 28'', flowering 4' x 4' stage at 24''.
  • PERFECT FOR ALL GROWTH STAGES: This grow light is sunlike full spectrum grow light, it contains 3000K, 5000K, 660nm and IR730nm chips. The light infinitely close to natural light and it provides desired need for plant growth in all stages from seeds to harvest. The IR 730nm chip looks dim, and it could speed up the phytochrome conversion , promote blooming/fruiting and increase yield.
  • WELL MADE & RELIABLILITY: This commercial greenhouse lights adopt glue coated technology, water resistant, increase the lifespan. Thick large aluminum heat sink for good heat dissipation, low heat could slow down the light decay and no fan no noise. High safety performance Mean Well driver, IP67 waterproof and UL/CE certified. High quality components ensure the lights more reliable and last longer.
  • HASSLE-FREE PURCHASING: Professional R&D and customer service teams will offer support for your any questions or help within 24 hours, 30-day money-back guarantee and 36-Month warranty after sale. Make your purchasing with confidence.
-$10.00 SALE OFFBestseller No. 4
ACKE ALP-400W LED Grow Light 5x5 Coverage for Veg Stage,Full Spectrum Growing lamp 4x4 Coverage for Flowering Stage,Plant Grow Light for Commercial Indoor Plant Grower
10 Reviews on Amazon
ACKE ALP-400W LED Grow Light 5x5 Coverage for Veg Stage,Full Spectrum Growing lamp 4x4 Coverage for Flowering Stage,Plant Grow Light for Commercial Indoor Plant Grower
  • 🌱Facilitating Large and High Quality Yields: ACKE led grow light selected high yielding Osram led light chips are extremely bright and can penetrate further than other plants lights ,to more easily reach and nourish the lower parts of your plants. efficacy with 2.7 umol/J.Max 2.5g yield per wattage
  • 🌿Lower Running Cost: Consuming only 390 watts with 378 leds,It saves up to 50% energy than other hps grow light,Perfect for 4x4 feet grow space,Max for 5x5 grow tents.
  • ☘️Optimal full spectrum grow light lamp : Mimic sunlight,ACKE grow lamp consist of 3000K,5000K, 660nm led chips for your indoor plants no sunlight and provide strong light intensity.The full spectrum led grow light with a “best of both worlds” color temperature of about 3,500K, which you can use for both vegging and flowering.
  • 🌹Run Cool Despite Big power Output: Thanks to the efficiency of the "spider style” of which spreading out light bars with thick aluminum heat sink,Your plants would be able to enjoy more intense light without worrying about the heat.
  • 🌼No Worries warranty: Plug and Play. No installation required. Owing to the grow lamp panel is assembling with 6 individual light bars,it's so easy to replace it,A plant lamp of easy maintenance,besides,we offer 24 months warranty.Our professional team are always ready to service you.
-$11.01 SALE OFFBestseller No. 5
SYLVANIA 400W Plantastar High Pressure Sodium Grow Light, T14.5, 50,000 Lumens, E39 Base, 100 Volts, 2100K, Clear - 1 Pack (65308)
19 Reviews on Amazon
SYLVANIA 400W Plantastar High Pressure Sodium Grow Light, T14.5, 50,000 Lumens, E39 Base, 100 Volts, 2100K, Clear - 1 Pack (65308)
  • RIGHT SPECTRUM OF LIGHT FOR PLANTS: These HID grow lights are for all stages of growth (vegetative, flowering, seeding, & budding) for any plant species. Our lamps provide a wider light spectrum to encourage healthy plant growth and more yield.
  • BEST-IN-CLASS: SYLVANIA HID grow lights are ideal for greenhouses and rapid growth gains. Product creates 600 µmol/s of PPF.
  • DESIGNED TO LAST: With a lifetime of 24,000 hours, spend less time replacing and more time sustaining plant growth.
  • VERSATILE: Contains an E39 Mogul base, comes in a clear finish and ellipsoid lamp shape. 400W and 100 Volts. ANSI ballast S51.
  • WARRANTY: Backed by our standard 5-year warranty - satisfaction guaranteed.
5/5 - (4 votes)

Bowden draws from over a decade of home growing experience as well as consulting for small-scale and hobbyist-level growers. He has written hundreds of articles, thought pieces, and tutorials about growing cannabis at home

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