HLG 750 Diablo ES hanging from adjustable ratchet ropes, ideal for grow tents and rolling benches with 5x5 flowering coverage.

HLG 750 FS QB400 Spectrum LED Grow Light

Q: How many watts do I need for my grow space?

The wattage depends on the size of your grow tent or room. A general guideline is 30-50 watts per square foot for high-light plants like cannabis. For example, a 2x2 ft area may need 100-200W, while a 4x4 ft area may require 400-600W for optimal coverage.

Q: What is the difference between full-spectrum and red/blue LED grow lights?

Full-spectrum LED lights mimic natural sunlight, providing a balanced mix of blue (for vegetative growth) and red (for flowering and fruiting) light. Red/blue LED lights focus on specific wavelengths but may not support plants as effectively as full-spectrum lights.

by Horticulture Lighting Group

$725.00 - $725.00

$725.00

$725.00 - $725.00

$725.00

All domestic orders ship in 1-4 business days. International orders ship in 5-10 business days.

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SAVE BIG! Contact us for Bulk Pricing and Rebate Eligibility, or call us at (973) 206-7590.

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Full Manufacturer’s Warranty

You buy it, we back it! Your purchase is fully covered with a manufacturer’s warranty. More details here.

Powerful full-cycle lighting with the HLG 750 FS QB400 for professional indoor growers.

The HLG 750 FS QB400 LED Grow Light brings the next generation of Full Spectrum (FS) performance to serious cultivators. Built with high-efficiency Quantum Boards and engineered for complete seed-to-harvest growth, it delivers balanced energy distribution across the PAR range for healthier plants and more uniform yields. Integrated reflectors enhance photon delivery deep into the canopy, producing consistent results from top to bottom while maintaining cooler, fanless operation.

Is the HLG 750 FS QB400 energy-efficient?

Yes — this fixture is engineered for high PPF output with exceptional µmol/J efficiency, outperforming legacy 1000W HPS fixtures (≈1.7 µmol/J). Its improved Full Spectrum design ensures higher photosynthetic response with less wasted energy. That means more usable light per watt, reduced heat load, and greater overall efficiency for both commercial and home grow setups.

Features

Integrated reflectors improve PPFD levels at all levels of canopy
Reliable passive-cooled design
Dimmable power supply included
5 Year Warranty

What's Included?

HLG 750 FS QB400 Spectrum LED Grow Light
Hanging Hardware
Rope Ratchets

Specifications

SKU: HLG-750-FS-QB400

Power: 0–730W

Voltage Range: 120–277V AC, 50–60Hz

Flowering Footprint / Canopy Distance: 5' x 5' / 15"–24"

Veg Footprint / Canopy Distance: 6' x 6' / 36"

System PPF Efficacy: TBD µmol/J

Total Output: TBD PPF

Dimensions: 37.5" x 27.125" x 3.75"

Product Weight: 20.25 lbs

Certifications: UL 8800, UL 1598, CSA

Warranty: 5 Years

Grow Light Central expert advice for indoor growing equipment

Who should use this full spectrum LED grow light?

Serious indoor growers seeking uniform, high-performance lighting for full-cycle cultivation
Commercial cultivators needing reliable 5x5 flowering coverage with advanced FS spectrum balance
Operators focused on even canopy penetration and reduced shading using integrated reflectors
Facilities prioritizing UL-certified, dimmable fixtures for professional setups

Best applications

Veg and flowering stages supported by optimized Full Spectrum output for all growth phases
Grow tents, flood tables, and rolling benches requiring consistent, balanced light coverage
Hydroponic and soil environments where passive cooling ensures stable operation
Commercial and home grows maximizing yield quality with precision PPFD distribution

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

FAQs

How many watts do I need for my grow space?

The wattage depends on the size of your grow tent or room. A general guideline is 30-50 watts per square foot for high-light plants like cannabis. For example, a 2x2 ft area may need 100-200W, while a 4x4 ft area may require 400-600W for optimal coverage.

What is the difference between full-spectrum and red/blue LED grow lights?

Full-spectrum LED lights mimic natural sunlight, providing a balanced mix of blue (for vegetative growth) and red (for flowering and fruiting) light. Red/blue LED lights focus on specific wavelengths but may not support plants as effectively as full-spectrum lights.

Replacement Screens for Bubble Magic Pollen Tumblers (All Sizes)

Satisfied customer

Fast shipping and good customer service!

HLG 350

So far just starting a run, but all is well. I’m playing with the light height and intensity as the run progresses. Easy setup no issues a solid light. I’ve owned dozens of grow lights over decades of growing HGL 350 appears to be on par with the others I’ve owned and still do.

Cheap and dangerous

Dulytek presses are outright dangerous, missing crucial pieces can lead to serious injury. I had missing washers on top of cage springs that launched the nuts and clips like bullets.

Ac infinity 3x3 tent kit.

Very happy with the product. Would definitely recommend over the cheap tents you get what you pay for. Just set it up and about to start germinating my seeds.