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
The Mars Hydro FC3000 and the Spider Farmer SE4500 are evenly matched, rated 4.4 and 4.4. The Mars Hydro FC3000 costs $20 less ($199.99 vs $219.99).
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
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 300 W and up LED grow light; a clear win is highlighted. How we rank explains each one.
| Factor weight | Mars Hydro FC3000 | Spider Farmer SE4500 |
|---|---|---|
| Overall rating | 4.4/5 | 4.4/5 |
| Value 30% | 73 $0.23 per µmol/s ($199.99, 855 µmol/s) | 72 $0.24 per µmol/s ($219.99, 913 µmol/s) |
| Efficacy 30% | 85 2.9 µmol/J | 85 2.9 µmol/J |
| Features 15% | 70 dimmable, controller or app | 70 dimmable, controller or app |
| Warranty 25% | 100 5-year warranty | 100 5-year warranty |
Specifications
| Mars Hydro FC3000 | Spider Farmer SE4500 | |
|---|---|---|
| Light | ||
| Power draw | 300 W | 320 W |
| PPF | 855 µmol/s | 913 µmol/s |
| Efficacy | 2.9 µmol/J | 2.9 µmol/J |
| Coverage | 3x3 ft | 2x4 ft |
| Spectrum | 650-665 nm red, 2800-3000K and 4800-5000K white | 660-665 nm red, 2800-3000K and 4800-5000K white |
| Build | ||
| Form | Multi-bar | Multi-bar |
| Dimmable | Yes | Yes |
| Controller or app | Yes | Yes |
| Weight | - | 10.2 lb |
| Warranty | 5 years | 5 years |