Mars Hydro FC3000
#7 in 300 W and upFull review
An efficient bar light for a 3x3 ft tent of tomatoes or peppers.
Amazon $199.99$199.99
4.3/5
A single panel that lights a 4x4 ft tent of full size vegetables. It suits growers who want one simple fixture; bar lights are more efficient.
- 450 WPower draw
- 1,141 µmol/sPPF
- 2.7 µmol/JEfficacy
- 4x4 ftCoverage
Check price at Amazon$259.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Lights a full 4x4 ft tent of tomatoes or peppers from one fixture
- Dims from seedling to full power on one knob
- Fanless, so it adds no noise to the room
- Several units can be dimmed together from one controller
Cons
- At about 14 lb it needs a sturdy tent bar
- Bar lights at the same price give more light per dollar
The Spider Farmer SF Series family
Every Spider Farmer SF Series model we rank, smallest first. Ratings compare each against its own power.
| Model | Power draw | Rating | Price |
|---|---|---|---|
| Spider Farmer SF1000 | 100 W | 4.1/5 | $69.99 |
| Spider Farmer SF1000D | 100 W | 4.1/5 | $59.99 |
| Spider Farmer SF2000 | 200 W | 4.3/5 | $155.99 |
| Spider Farmer SF4000 (this one) | 450 W | 4.3/5 | $259.99 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its power. How we rank explains each one.
Specifications
| Model number | SF4000 |
|---|---|
| Light | |
| Power draw | 450 W |
| PPF | 1,141 µmol/s |
| Efficacy | 2.7 µmol/J |
| Coverage | 4x4 ft |
| Spectrum | 660-665 nm red, 730-740 nm IR, 2800-3000K and 4800-5000K white |
| Build | |
| Form | Panel |
| Dimmable | Yes |
| Controller or app | Yes |
| Weight | 14.1 lb |
| Warranty | 5 years |
Alternatives in this power
Spider Farmer SE4500
#8 in 300 W and upFull review
An efficient bar light for a 2x4 ft tent or a long bench of vegetables, with app control included.
Amazon $219.99$219.99
Mars Hydro TS3000
#10 in 300 W and upFull review
A single panel for a 4x4 ft tent of tomatoes or peppers. Choose it if you prefer one simple board; bar lights are more efficient.
Amazon $269.99$269.99
Compare
Compare the Spider Farmer SF4000 with any other LED grow light →
More from Spider Farmer: every Spider Farmer product ranked.