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HLG 350 Diablo LED grow light, full spectrum quantum board, white frame.
White HLG 350 Diablo LED grow light with full-spectrum LEDs, suspended by wires.
HLG 350 Diablo quantum board LED grow light with full spectrum diodes and white frame.
Horticulture Lighting Group HLG 350 Diablo full-spectrum LED grow light with white frame and numerous LEDs.
HLG 350 Diablo LED grow light, full spectrum quantum board, white frame.
White HLG 350 Diablo LED grow light with full-spectrum LEDs, suspended by wires.
HLG 350 Diablo quantum board LED grow light with full spectrum diodes and white frame.
Horticulture Lighting Group HLG 350 Diablo full-spectrum LED grow light with white frame and numerous LEDs.
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HLG 350 Diablo Full Spectrum LED Grow Light

5.0 (1 review)
Official Horticulture Lighting Group Dealer Model: HLG350D
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Call (360) 800-5535
  • 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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Ask Sage about this product
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THROUGH THE Cultivator's LENS Product Evaluation

  • You are upgrading to this lamp because you want to cut power consumption while maintaining the intensity of a 600W HID.
  • You are choosing this fixture for a 3' x 5' space because you need an even light spread without hot spots.

  • The passive cooling design avoids fan noise and keeps moving parts out of the light fixture.

  • Users who swapped out their old 600W HPS lights say they noticed immediate drops in monthly energy bills.
  • Growers who added this to their rooms report that the integrated reflectors kept the canopy healthy at the edges.

HLG 350 Diablo Full Spectrum LED Grow Light

Tired of the high heat and energy bills from your old 600-watt HPS lights? The HLG 350 Diablo is the ultimate upgrade, delivering superior performance with just 330 watts. It's a powerful replacement for a 600W HID, setting a new standard for modern LED grow lights.

Each HLG 350 Diablo is built with two advanced Diablo Quantum Boards® from Horticulture Lighting Group, featuring high-efficiency Samsung full-spectrum white and deep red LEDs. This combination produces a powerful, sun-like light that fuels vigorous growth from the moment you move plants out of the HLG Propagator 2.0 until harvest. With integrated reflectors, this fixture ensures deep canopy penetration, leading to higher-quality yields. To maximize resin and potency, consider adding an HLG 30 UVA Supplement Bar to your grow space.

Features

💡
Superior Efficiency

Replaces a 600W HPS light using only 330W, drastically cutting energy costs.

🌿
Full-Cycle Spectrum

Samsung white and deep red LEDs provide the perfect spectrum. For dedicated vegetative stages, the HLG 250 VEG Pro is a tailored alternative.

💥
High-Intensity Output

Delivers over 950 PPF for intense light that drives exceptional plant growth.

↔️
Even Canopy Coverage

A 35" wide design with integrated reflectors ensures uniform light distribution.

❄️
Passive Cooled Design

Silent, fanless operation provides reliability and reduces ambient heat.

🎛️
Fully Dimmable

Adjust intensity from 0 to 330 watts. For remote control, this unit is compatible with the HLG Growflux Access Point Controller.

🌍
Universal Voltage

Auto-sensing power supply works on 120V, 240V, and 277V circuits.

🛡️
5-Year Warranty

Backed by HLG's comprehensive warranty for complete peace of mind.

Spectrum Analysis

Horticulture Lighting Group HLG 350 Diablo Spectrum Analysis Chart

Specifications

Specification Value
Power 0-330W
Voltage Range 120-277 VAC, 50-60Hz
LEDs Full Spectrum White & Deep Red
Flowering Footprint 3' x 5' @ 15"
Veg Footprint 5' x 5' @ 24"
System PPF Efficacy 2.80 μmol/joule
Total Output (PPF) 950+ PPF
Dimensions 35" x 9.5" x 3.25"
Weight 10 lbs
Mounting Height 15" - 24" above canopy
Certifications UL 8800, CSA, DLC

Support & Manuals

Warranty

The HLG 350 Diablo is covered by a 5-year manufacturer's warranty. This warranty does not cover user error or operator abuse.

FAQs

What is the main advantage of the HLG 350 Diablo over a traditional 600W HPS light?+

The HLG 350 Diablo offers three key advantages: superior energy efficiency (using almost 50% less power), a significant reduction in heat output (making climate control easier), and a full, optimized spectrum that promotes healthier plant growth and higher-quality yields compared to the limited spectrum of HPS bulbs.

What are the ideal coverage areas for this light?+

For flowering, the HLG 350 Diablo effectively covers a 3' x 5' area. For vegetative growth, it can cover a larger 5' x 5' footprint. The recommended mounting height is 15-24 inches above the plant canopy.

What makes HLG's Quantum Board technology special?+

Quantum Boards are large circuit boards with many small, highly efficient LEDs spread across them. This design allows for a more even light distribution, better heat dissipation (enabling the fanless design), and superior efficiency (PPF/W) compared to traditional COB or single-diode fixtures. To learn more about what makes this technology a game-changer, check out our guide on how HLG sets the bar for Quantum Board grow lights.

Is this light dimmable?+

Yes, the HLG 350 Diablo features a built-in dimmer that allows you to adjust the power output from 0 to 330 watts. This gives you precise control over light intensity, which is ideal for different growth stages from seedlings to late flower.

What other lights does HLG offer for different-sized spaces?+

The HLG 350 Diablo is perfect for its specified coverage area. For larger spaces, you might consider the more powerful HLG 750 Diablo for a significant boost in output, or the HLG 750 Diablo X for maximum performance in high-intensity applications.

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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.)

Call (360) 800-5535

Why Trimleaf

Equipping home growers, craft producers, and commercial operations across North America since 2016.

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D
David F.
HLG 350

My first grow under this light produced 28 ounces. I stuffed 6 plants under this light quality was on par with my Hps grows in the past with potency higher than past grows under a 600w hps. If you are looking for an efficient replacement for a 600w hps this is the light you want.

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