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Free Shipping on most orders over $175 | Sales Tax in NJ only

Adjustable Spectrum Grow Lights

Tunable spectrum LED grow lights let growers fine-tune wavelength ratios for different stages of plant growth. Do you need more blue during vegetables to keep internodes tight? More red and far-red for explosive blooms? These grow lights let you dial in the ideal blend.

Spectrum plays a role in shaping plant height, leaf expansion, and pigment expression. Adjustable grow lights allow precise control in dynamic grow environments. Ideal for serious growers chasing optimal morphology and performance across a 2×2 to 5×5 ft space.

Grow smarter with bulk discounts and rebate opportunities only at Grow Light Central.

Spectrum chart showing 12 preset light spectrums available on the Tarantula Voyager grow light for customized plant growth.
Top-down view of the Tarantula Voyager LED grow light displaying 10 evenly spaced LED light bars for full canopy coverage.
$1,149.00 - $1,149.00
$1,149.00
$1,149.00 - $1,149.00
$1,149.00

Grand Master LEDs Tarantula Voyager - Dual Channel

Grand Master LEDs

A commercial-ready LED grow light engineered for controlled intensity, uniform coverage and long term production reliability. This LED grow light i...

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$1,149.00 - $1,149.00
$1,149.00
$1,149.00 - $1,149.00
$1,149.00
GrowPros DraGrow 2 1350W LED grow light spectrum chart with UV, full spectrum, far red, and PPFD map at 12-inch height.
Top view of GrowPros DraGrow 2 Channel LED Grow Light with full spectrum UV + IR bars illuminated 1350 Watts & 18% off
$1,199.00
$1,199.00 - $1,199.00
$1,199.00
$959.00
$959.00 - $959.00
$959.00

GrowPros DraGrow Dual Channel 1350W LED Grow Light - UVA & Full Spectrum + Far Red + Deep Blue

GrowPros

Offering three power modes, UV and Far Red, dual dimming channels, and 3.02 µmol/J efficiency for powerful 4x6 canopy coverage. The Dragrow 4x6 Ful...

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$1,199.00
$1,199.00 - $1,199.00
$1,199.00
$959.00
$959.00 - $959.00
$959.00
Save $240.00 Save $0.00
PPFD map chart of Grand Master LEDs Tarantula Borg Evolution V2 for different heights with average PPFD values on a white background.
Image showing the four light spectrum channels and how they can be controlled independently.
$1,300.00 - $1,300.00
$1,300.00
$1,300.00 - $1,300.00
$1,300.00

Grand Master LEDs Tarantula Borg Evolution V2 - 4 Channels

Grand Master LEDs

Dominate every stage with this 4-channel, 10-bar LED designed for commercial scale, spectrum control, and fast deployment. The Tarantula Borg Evolu...

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$1,300.00 - $1,300.00
$1,300.00
$1,300.00 - $1,300.00
$1,300.00
Image showing various spectrum graphs for the Grand Master LEDs Tarantula Explorer with multiple light configurations ranging from 320nm to 800nm.
Image showing the top-down view of the Grand Master LEDs Tarantula Explorer LED light fixture, emphasizing its spread of light bars for optimal coverage.
$949.00 - $949.00
$949.00
$949.00
$949.00 - $949.00
$949.00

Grand Master LEDs Tarantula Explorer LED Grow Light - Dual Channel

Grand Master LEDs

Optimize commercial grows with dual-channel LED, waterproof IP66 design, and fast setup for any indoor environment. The Tarantula Explorer is a pow...

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$949.00 - $949.00
$949.00
$949.00
$949.00 - $949.00
$949.00

Frequently Asked Questions

Which adjustable LED grow lights are top-rated?

Look for spectrum-tunable LED lights that shift between Veg, Bloom, and Full Spectrum modes. Top units from brands such as Grand Master LEDs, GrowPro, and Scynce LED feature manual knobs or app control over blue, red, green, and far‑red channels, ensuring you only need one versatile fixture for all growth stage.

What are ideal preset recipes/settings for an adjustable grow light?

Use blue-heavy (~15–20% blue) in Veg mode to boost compact foliage; switch to Bloom/Flower mode rich in red (≥ 50%) with some far‑red to trigger flowering; full-spectrum white is great for transitions or mixed-phase grows.

How should I use adjustable spectrum grow lights effectively?

Hang lights at 24–36″ during Veg and 18–24″ during Flower (adjust per PPFD readings), choose Veg/Bloom presets or fine-tune channels, and match intensity to stage—e.g., dim during seedlings, ramp to full power in bloom.

Are there energy rebates or incentives for switching to adjustable-spectrum LED grow lights?

Yes! We offer a free eligibility check for rebates covering LED grow lights (including spectrum-tunable models), HVAC systems, and dehumidifiers.