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HLG 350 Diablo full-spectrum LED grow light featuring Quantum Boards with many small LEDs arranged on a white panel.
Suspended white HLG 350 Diablo full-spectrum LED grow light with numerous visible LED panels.
White Horticulture Lighting Group (HLG) 350 Diablo full spectrum LED grow light panel with visible LEDs.
White Horticulture Lighting Group (HLG) 350 Diablo full-spectrum LED grow light with Quantum Boards.
HLG 350 Diablo full-spectrum LED grow light featuring Quantum Boards with many small LEDs arranged on a white panel.
Suspended white HLG 350 Diablo full-spectrum LED grow light with numerous visible LED panels.
White Horticulture Lighting Group (HLG) 350 Diablo full spectrum LED grow light panel with visible LEDs.
White Horticulture Lighting Group (HLG) 350 Diablo full-spectrum LED grow light with Quantum Boards.

HLG 350 Diablo Full Spectrum LED Grow Light

Official Horticulture Lighting Group Dealer Model: HLG350R
$1,399.00 CAD$1,199.00 CAD$1,399.00 CAD
 $1,399.00 CAD
starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Options:Pay in 6, Pay Monthly
Amount:Up to $1,500 (Pay in 6)
$1,501–$30,000 (Monthly)
Schedule:Bi-weekly / Monthly
Term:6 bi-weekly / 6–60 months
Interest:0% (up to $1,500) / 11.99% APR
Not available in:Quebec
Looking to finance equipment under your corporation? Learn more about Business Financing
  • 950+ PPF output covering a 3x5 foot flowering footprint at 330 watts
  • Custom Diablo Quantum Boards with Samsung white and deep red LEDs for 2.80 µmol/j efficacy
  • Passive-cooled fanless design operates silently and fits standard 120V to 277V power circuits
  • 5-year warranty covering manufacturing defects
  • View More Details
Order today, ships between June 3 - June 17, 2026

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THROUGH THE Cultivator's LENS Hands-On Evaluation

Who This Is For

  • You are swapping your old 600W HID for LEDs because the high power bills and heat are eating into your labour budget.
  • You are switching to Diablo boards because your lower branches stay airy and underdeveloped under standard fixtures.

What We Found

  • The rectangular board design is far better for 3x5 tents than square lights that waste energy on the side walls.
  • We see the best results when growers use the deep red spectrum to drive density during the final flowering stage.
  • Moving parts are usually what fail first, so the fanless design makes this a very reliable long-term workhorse.

What Users Say

  • Growers who swapped their 600W HID units for these report significantly lower cooling costs and higher yields.
  • Users covering 3x5 areas say the edge-to-edge light spread prevents the typical middle-only growth they used to see.

HLG 350 Diablo Full Spectrum LED Grow Light

Struggling with the heat and high energy bills from your old 600W HID lights? The Horticulture Lighting Group 350 Diablo is the ultimate upgrade, delivering superior full-spectrum light with just 330 watts. This powerful fixture is one of the most efficient LED grow lights on the market, engineered to boost your yields without breaking the bank.

At its core are two custom-designed Diablo Quantum Boards®, packed with high-performance Samsung white and deep red LEDs. This advanced design, combined with integrated reflectors, pushes light deep into the canopy, nourishing lower branches for more consistent, high-quality results. Its rectangular shape is perfect for covering a 3' x 5' flowering area or a 5' x 5' vegetative space, making it a versatile choice for any indoor garden. If you need a light focused purely on vegetative growth, the HLG 250 VEG Pro is another excellent option. For growers needing to cover a larger area, the HLG 750 Diablo offers double the power.

Features

💡
High Efficiency

Replaces a 600W HPS/MH lamp while consuming only 330 watts, saving you money on electricity.

🌿
Advanced Diablo Boards

Features two custom Diablo Quantum Boards® with Samsung LEDs for an incredible 2.80 PPF/W efficacy.

📏
Optimized Footprint

Delivers even, edge-to-edge coverage for a 3'x5' flowering area or a 5'x5' vegetative space.

🎨
Full Spectrum Power

Combines full-spectrum white and 660nm deep red LEDs to fuel vigorous growth and dense flowering.

❄️
Passive Cooling

The fanless, passive-cooled design ensures silent operation and exceptional reliability with no moving parts.

✅
5-Year Warranty

Your investment is protected by an industry-leading 5-year warranty for complete peace of mind.

HLG 350 Diablo Spectrum Analysis

Horticulture Lighting Group HLG 350 Diablo Full Spectrum LED Grow Light Spectrum Analysis Chart

HLG 350 Diablo Specifications

Specification Value
Power 0-330W
AC 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

HLG offers a 5-year warranty on the 350 Diablo, covering any manufacturing defects. Please note that the warranty does not cover user error or operator abuse.

FAQs

What is the actual power draw of the HLG 350 Diablo?+

The HLG 350 Diablo has a variable power output, drawing between 0 and 330 watts. It's designed to efficiently replace a traditional 600W HID lamp while consuming significantly less energy.

What are the ideal coverage areas for this light?+

For flowering, this light provides excellent coverage for a 3' x 5' area. For vegetative growth, it can effectively cover a larger 5' x 5' footprint. To push your results further, you can combine this with an HLG 30 UVA Supplement Bar during the final stages of flower.

Is this light dimmable?+

Yes, the HLG 350 Diablo features a dimmable driver, allowing you to adjust the light intensity from 0 to 330 watts to suit your plants' specific needs at every stage of growth. For wireless control, this fixture is compatible with the HLG Growflux Access Point Controller.

What makes the Diablo Quantum Boards® special?+

The advanced Diablo Quantum Boards® use high-efficiency Samsung full-spectrum white and deep red LEDs. This technology, combined with integrated reflectors, ensures deep canopy penetration and a high PPF efficacy of 2.80 μmol/joule for healthier plants and bigger yields. You can learn more in our article about how HLG sets the bar for quantum board grow lights.

Can I use this light in a commercial setup?+

Absolutely. While it's great for smaller spaces, its high efficiency, reliable passive cooling, and auto-sensing power supply (120-277V) make it a solid choice for vegging in commercial grows or for smaller flowering rooms. For larger commercial setups requiring higher output, you might consider the HLG 750 FS.

How does this model compare to other HLG lights?+

The 350 Diablo is a fantastic mid-range light for its footprint. If you need a more compact solution for smaller spaces or cloning, the HLG 100 V2 is a great option, or even the HLG 65 V2 Veg for early stage growth. For maximum power and coverage in a high-intensity fixture, consider the HLG 750 Diablo X. Each light in the Horticulture Lighting Group lineup is designed for a specific purpose.

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.)

Call (778) 300-3154

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