Best LED Grow Lights for Cannabis: Top Picks Compared
Compare the best LED grow lights for cannabis by efficacy, spread, dimming, heat, and warranty, with a top pick plus runner-ups for every room size.
Best Budget LED Grow Light for Weed: Spider Farmer SF-1000
The Spider Farmer SF-1000 is the best budget LED grow light for a 2x2 ft tent. It costs about $100. It uses 100 watts. It has Samsung LM301 diodes and a Mean Well driver. It is dimmable. It covers 3x3 ft for veg and 2x2 ft for flower. It runs at 2.7 umol/J. It produces little heat. It has a 5-year warranty.
This light works for one or two cannabis plants. It keeps electricity costs low. At 12 hours per day, it uses 1.2 kWh per day. At $0.15 per kWh, that is $0.18 per day.
Best LED Grow Lights for Small Cannabis Grows: Comparison Guide
Other Budget LED Grow Lights for Weed
Mars Hydro TS 1000
- Price: about $130
- Power: 150 watts
- Coverage: 3x3 ft veg, 2x2 ft flower
- Dimmable: no
- Efficiency: 2.3 umol/J
- Warranty: 3 years
The Mars Hydro TS 1000 has more power than the SF-1000. It is not dimmable. It runs hotter. It works for a 2x2 ft flower tent.
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Viparspectra P1000
- Price: about $90
- Power: 100 watts
- Coverage: 3x3 ft veg, 2x2 ft flower
- Dimmable: yes
- Efficiency: 2.4 umol/J
- Warranty: 3 years
The Viparspectra P1000 is dimmable. It costs less than the SF-1000. It uses different diodes. It has a lower efficiency.
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Bloom Plus BP1000
- Price: about $70
- Power: 100 watts
- Coverage: 2x2 ft veg, 1.5x1.5 ft flower
- Dimmable: no
- Efficiency: 2.2 umol/J
- Warranty: 2 years
The Bloom Plus BP1000 is the cheapest option. It covers a smaller area. It has a shorter warranty.
What to Look For in a Budget LED Grow Light
Check the actual wattage from the wall. Do not trust equivalent wattage. Check the PPFD map. PPFD is the light intensity at a given distance. For cannabis flowering, aim for 500 to 800 PPFD. Check the spectrum. Cannabis needs more red and blue light. Check the dimming. Dimming helps control heat and stretch. Check the warranty. Budget lights often have 2 to 3 year warranties.
LED grow lights use less electricity than HPS lights. They produce less heat. They last longer. They do not need bulb changes. For a small cannabis grow, a 100-watt LED is enough for one or two plants.
Legal note: Cannabis cultivation is illegal under US federal law. State laws vary. Check your state before you grow.