Grow Lights
Research-based buying guidance, not hands-on testing. Products are drawn from current buying guides and manufacturer specs; we haven't personally grown with each one.
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The single highest-impact purchase in an indoor grow — light is the plant's food source, and underpowered lighting is the most common reason a beginner grow underperforms. Buy based on your tent's footprint, not on wattage alone; two lights with the same wattage can put out very different usable light depending on diode quality and spectrum.
How to choose
- 1
Coverage area, not just wattage
Match the light's rated coverage (in square feet) to your tent size. A light rated for a 2x2 footprint will leave a 4x4 tent badly underlit even if the wattage number looks reasonable.
- 2
Full-spectrum output
Look for lights that cover both the blue-heavy spectrum plants want in veg and the red-heavy spectrum they want in flower, ideally adjustable rather than fixed to one ratio.
- 3
Diode quality
Named diode brands (like Samsung's LM301B series) are a reasonable proxy for efficiency and longevity when a listing doesn't give independently tested output numbers.
- 4
Heat and hang height
More efficient lights run cooler and can hang closer to the canopy without stressing plants — worth factoring into small, low-ceiling tent setups.
Researched picks
Prices are approximate as of September 30, 2026 and change often.
Atreum Lighting HYDRA-1000(opens in a new tab)
- Best for
- 2x2 ft tents, budget-conscious first grow
- Specs
- 100W, full-spectrum, algorithmically spaced diodes
- Approx. price
- $100–130
ViparSpectra XS1500 Pro(opens in a new tab)
- Best for
- 2x2 ft tents, growers who want dimmer control
- Specs
- 150W, full-spectrum with built-in dimmer
- Approx. price
- $130–160
Gorilla Xi220(opens in a new tab)
- Best for
- 2x2 to 2.5x2.5 ft tents, growers who want app-based control
- Specs
- 220W, Samsung & OSRAM diodes, tri-channel spectrum with UV/IR, app control
- Approx. price
- $250–300
FloraFlex 400W Full-Spectrum LED(opens in a new tab)
- Best for
- 4x4 ft tents, even canopy coverage on a bar-style fixture
- Specs
- 400W, bar-style design with custom diodes for even light distribution
- Approx. price
- $300–350
MIGRO ARAY 500(opens in a new tab)
- Best for
- 4x4 ft tents, growers who care about tested efficiency numbers
- Specs
- 500W, 3.1 µmol/J efficiency (independently tested), remote driver keeps heat out of the canopy
- Approx. price
- $400–450
California Lightworks SolarSystem 550(opens in a new tab)
- Best for
- 4x4 ft tents, growers who want long-term reliability and fine spectrum control
- Specs
- 550W, independent RGB channel control, 5-year warranty
- Approx. price
- $500–600