Angled view of the Grand Master LEDs Tarantula 9000K Booster Bar showing power connectors and sleek aluminum design.

Grand Master LEDs Tarantula 9000K Booster Bar Pair

Q: How much yield increase can I expect from under canopy lighting?

Growers typically see 10–30% higher yields. LED under canopy lights help shaded branches produce dense, top-quality buds instead of small, underdeveloped ones.

Q: Are under canopy LED lights energy efficient and cost effective?

Yes. With efficiencies of 2.5–3.0 μmol/J, these lights use little power while significantly boosting production, making them a high ROI investment for indoor bud growers.

Q: How do I install under canopy grow lights in my setup?

Under canopy LED bars are slim and easy to mount. They can be placed on the floor, clipped to tent poles, or daisy-chained along racks, fitting hobby tents or commercial grows.

by Grand Master LEDs

$150.00 - $150.00

$150.00

$150.00 - $150.00

$150.00

Use code GM5 for 5% off GML orders over $1,000.

Call for special pricing on Canadian orders

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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.

The Tarantula 8000K Booster Bar enhances vegetative growth with high-efficiency blue light, promoting strong roots, compact structure, and uniform canopy development

Enhance vegetative growth with energy-efficient blue spectrum booster bars for tighter nodes and stronger roots.

The Grand Master Tarantula Booster 9000K Bar Pair was developed for growers looking to fine-tune plant structure, improve crop steering strategies, and supplement existing lighting systems without adding significant power consumption. Utilizing a specialized 9000K spectrum, these supplemental bars provide targeted light that influences plant morphology and enhances overall canopy performance during the vegetative stage.

Perfect for commercial cultivation facilities, vertical farming systems, research rooms, and advanced home growers, the Tarantula Booster integrates easily alongside existing LED grow lights. Its slim profile, daisy chain capability, and IP66 waterproof construction make installation simple while providing the durability required for demanding cultivation environments. When paired with a Grand Master Controller, growers gain additional flexibility to optimize lighting strategies throughout the crop cycle.

Features

Designed for Supplemental Light and Crop Steering
Daisy Chainable
LEDESTAR Diodes
IP 66 Waterproof
Recommended to be controlled with the Grand Master Controller
May be compatible with other controllers via the RJ14 port (refer to the respective manufacturer’s manual for compatibility details)
5 Year Warranty

What's Included?

4 x Ratchet Hangers
2 x Light Bars
1 x Daisy Chain Cable & Connectors (AC) (5 ft)
1 x Power Cord and Plug (10 ft)
8 x Zip Ties
1 x End Cap

Download Resources

Product Manual

Specifications

Max Wattage: 30 watts per bar

Voltage Range: 120V to 277V available

Vegetation Footprint: 5 ft x 5 ft

System PPF Efficacy: 2.65 µmol per joule

Total Light Output: 80 PPF

Dimensions: 40 in x 2 in

Certifications: ETL listed, IP66 rated

Spectrum

Grow Light Central expert advice for indoor growing equipment

Who Should Use this LED Light?

Commercial Growers Designed for high-efficiency vegetative growth.
Crop Steering Experts 8000K spectrum enhances structural development.
Precision Cultivators Ideal for boosting plant vigor and reducing stretch.
Tech-Savvy Growers RJ14 port allows seamless controller integration.
Scalable Growers Daisy-chain capability simplifies multi-light expansion.

Best Applications

Vegetative Growth Boost 8000K spectrum promotes strong roots and compact growth.
Supplemental Lighting Enhances primary fixtures for full-spectrum coverage.
Large-Scale Coverage 5' x 5' footprint ensures even light distribution.
Automated Grow Systems Controller compatibility allows precise spectrum adjustments.
Commercial Greenhouses IP66 waterproof rating ensures durability in humid environments.

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

Do under canopy LED lights really improve bud growth?

Yes. Under canopy lights give lower bud sites direct light, preventing popcorn buds and boosting density, potency, and overall yields with more uniform bud growth.

How much yield increase can I expect from under canopy lighting?

Growers typically see 10–30% higher yields. LED under canopy lights help shaded branches produce dense, top-quality buds instead of small, underdeveloped ones.

Are under canopy LED lights energy efficient and cost effective?

Yes. With efficiencies of 2.5–3.0 μmol/J, these lights use little power while significantly boosting production, making them a high ROI investment for indoor bud growers.

How do I install under canopy grow lights in my setup?

Under canopy LED bars are slim and easy to mount. They can be placed on the floor, clipped to tent poles, or daisy-chained along racks, fitting hobby tents or commercial grows.