Nextlight NEXlight 420H LED grow light, flat panel design with many white LEDs.

Nextlight 420h LED grow light with aluminum frame and reflective surface.

Close-up of an LED grow light dimmer knob on a silver enclosure with wire hangers.

Square LED grow light with a white diffuser panel, silver frame, and CE certification mark.

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NextLight 420H Full Spectrum LED Grow Light

~~$529.00 USD~~ $298.00 USD$529.00 USD

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MODEL: NXT420H-120V

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I've got this light set up in my 3x3 tent, primarily for vegging, and it's been phenomenal. Even at full power with just an exhaust fan and no AC, my temperatures never exceeded 81 degrees. It's absolutely perfect for tent and closet grows. Bravo to the team behind this fantastic light!

- Jose

★★★★★

Full Spectrum

Type

420W

Power

3' x 3'

Coverage

5 Years

Warranty

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

1 x NextLight 420H Fixture
1 x NextLight h Series Power Cord (10')

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

📄NextLight 420H User Manual 📄NextLight 420H Spec Sheet

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.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

Most orders are processed within 24-48 hours after being placed.

Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more