Mars Hydro FC4800
#10 in 300 W and upFull review
An efficient bar light for a 4x4 ft tent of fruiting plants. Choose it over the FC-E4800 if a lower power bill matters more than the lower price.
Amazon $339.99$339.99
The Mars Hydro FC4800 is the better LED grow light overall, rated 4.4 to 4.3. The Mars Hydro FC4800 leads on efficacy. The Spider Farmer SF4000 costs $80 less ($259.99 vs $339.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Spider Farmer SF4000
#11 in 300 W and upFull review
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.
Amazon $259.99$259.99
Which should you buy?
- Choose the Mars Hydro FC4800 for efficacy (2.9 µmol/J vs 2.7 µmol/J).
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 FC4800 | Spider Farmer SF4000 |
|---|---|---|
| Overall rating | 4.4/5 | 4.3/5 |
| Value 30% | 70 $0.25 per µmol/s ($339.99, 1,368 µmol/s) | 75 $0.23 per µmol/s ($259.99, 1,141 µmol/s) |
| Efficacy 30% | 85 2.9 µmol/J | 70 2.7 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 FC4800 | Spider Farmer SF4000 | |
|---|---|---|
| Light | ||
| Power draw | 480 W | 450 W |
| PPF | 1,368 µmol/s | 1,141 µmol/s |
| Efficacy | 2.9 µmol/J | 2.7 µmol/J |
| Coverage | 4x4 ft | 4x4 ft |
| Spectrum | 650-665 nm red, 2800-3000K and 4800-5000K white | 660-665 nm red, 730-740 nm IR, 2800-3000K and 4800-5000K white |
| Build | ||
| Form | Multi-bar | Panel |
| Dimmable | Yes | Yes |
| Controller or app | Yes | Yes |
| Weight | 20 lb | 14.1 lb |
| Warranty | 5 years | 5 years |