- 1 x NextLight 420H Fixture
- 1 x NextLight h Series Power Cord (10')
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NextLight 420H Full Spectrum LED Grow Light
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- Free Shipping On Most Items*To the lower 48
- Transparent PricingBacked w/ price match guarantee
- 4.8/5 Top Quality Store on Google
- Secure CheckoutSSL encrypted payments
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VOLUME PRICING
Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
- You are upgrading to a high-output light because your current setup produces weak, airy growth that lacks the density you need.
- You are setting up a 3' x 3' flowering space because you need a fixture that fits your tent while keeping heat manageable.
- The passive cooling design eliminates fan noise, keeping your tent quiet while the light runs at full intensity.
- This unit fits perfectly in 3x3 tents, running at full power without needing AC to keep temperatures under 81 degrees.
- Growers who run this in a 3x3 tent report that they can maintain stable, cool temperatures without extra cooling gear.
- Users who switch to this full-spectrum unit say their plants show consistent development from the vegetative stage to harvest.
NextLight 420H Full Spectrum LED Grow Light
Finding the right balance of intensity and heat management for a mid-sized grow space can be a challenge. The NextLight 420H is the definitive solution for home growers who need professional-grade performance without the complexity. Designed specifically for 3' x 3' flowering footprints, this fixture delivers high-output full-spectrum light while remaining cool enough for closets and tents. If you need a more compact solution for smaller spaces, the NextLight 150H is also available.
The NextLight 420H is a plug-and-play powerhouse. It features a built-in dimmer to protect young plants from light stress and utilizes passive cooling to eliminate noisy fans. Whether you are scaling up your hobby or starting a dedicated flower room, the 420H provides the sun-like spectrum your plants crave for dense, high-quality yields.
What's Included
Features
☀️
Full-Spectrum
Sun-like bright white light optimized for both vegetative and flowering stages.
📐
Perfect Coverage
Covers up to 5' x 5' for veg and 3' x 3' for high-intensity flowering.
🔌
Plug & Play
Ready to use out of the box with passive cooling and no assembly required.
💧
IP65 Rated
Water-resistant construction ensures durability in humid grow environments.
Specifications
| Specification | Value |
|---|---|
| Energy Use | 420 Watts |
| PPF | 1092 µmol/s |
| Efficiency | 2.6 µmol/j |
| Input Current | 3.5A @ 120V, 1.75A @ 240V |
| Operating Voltage | 120-277 VAC |
| Dimensions | 25" x 24.75" x 3" |
| Weight | 12 lbs (5.44 kg) |
| Warranty | 5 Years Full |
| Environment | IP65 Wet Rated |
Spectrum Analysis
NextLight Full Spectrum LED
NextLight fixtures emit a full spectrum, bright white light which is more sun-like than traditional HPS. This spectrum promotes tighter internodal spacing and superior overall flower quality. By pioneered the use of bright white LED, NextLight provides the sun-like qualities plants love without the excessive heat or energy waste.
Support & Manuals
Warranty
The NextLight 420H is backed by a 5-year full manufacturer's warranty. This covers any defects in material or workmanship, including instances where 20% or more of the LED array fails to illuminate. For advanced control and integration, consider pairing your system with the NextLight Control Pro Controller.
FAQs
What is the coverage area for the NextLight 420H?
The 420H covers a 5' x 5' area for vegetative growth and a 3' x 3' area for high-intensity flowering.
Does this light require an external controller to dim?
No, the NextLight 420H features a built-in dimmer dial, allowing you to adjust intensity manually from 0-100%.
Is the NextLight 420H noisy during operation?
No, it uses passive cooling technology with no moving parts, making it completely silent.
Can this light be used in humid grow tents?
Yes, the fixture is IP65 wet-rated, meaning it is protected against dust and low-pressure water streams from any angle.
How long will the LEDs last?
The 420H has a life rating of Q90 > 50,000 hours, meaning it will maintain at least 90% of its light output after 50,000 hours of use.
Happy To Help
Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Why Trimleaf
Equipping home growers, craft producers, and commercial operations across North America since 2016.
10+
Years of Specialist Knowledge
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2002+ Verified Reviews
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J
Plants are loving it now that I have the AC unit, iv had to re purchase an 8inch exhaust cuz the 4 wasn’t pushing the heat out. Re bought a 8inch isolating fan to replace my 4 inch. I purchased a portable AC unit for the room that’s average 71 at night 77 in the day in the tent 81 too 95/105 with Exhaust is exiting the room.
Now with the new Exhaust, fan, and Ac unit. Room temp is 72 with the tent temp at 81 average in the day
