Mars Hydro FC-E6500
#1 in 300 W and upFull review
A water resistant bar light for a 5x5 ft tent of vegetables or fruiting plants, at a low price for its output.
Amazon $409.99$409.99
The Mars Hydro FC-E6500 is the better LED grow light overall, rated 4.6 to 4.4. The Mars Hydro FC-E6500 leads on features and value. The Spider Farmer SE5000 wins on efficacy. The Spider Farmer SE5000 costs $70 less ($339.99 vs $409.99).
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 SE5000
#6 in 300 W and upFull review
A high efficiency bar light for a 3x3 to 4x4 ft tent of tomatoes, peppers or cucumbers. Worth it if electricity costs matter to you.
Amazon $339.99$339.99
Which should you buy?
- Choose the Mars Hydro FC-E6500 for features (dimmable, controller or app, IP65 or better vs dimmable, controller or app) and value ($0.20 per µmol/s ($409.99, 2,044 µmol/s) vs $0.24 per µmol/s ($339.99, 1,420 µmol/s)).
- Choose the Spider Farmer SE5000 for efficacy (2.9 µmol/J vs 2.8 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 FC-E6500 | Spider Farmer SE5000 |
|---|---|---|
| Overall rating | 4.6/5 | 4.4/5 |
| Value 30% | 83 $0.20 per µmol/s ($409.99, 2,044 µmol/s) | 72 $0.24 per µmol/s ($339.99, 1,420 µmol/s) |
| Efficacy 30% | 80 2.8 µmol/J | 90 2.9 µmol/J |
| Features 15% | 100 dimmable, controller or app, IP65 or better | 70 dimmable, controller or app |
| Warranty 25% | 100 5-year warranty | 100 5-year warranty |
Specifications
| Mars Hydro FC-E6500 | Spider Farmer SE5000 | |
|---|---|---|
| Light | ||
| Power draw | 730 W | 480 W |
| PPF | 2,044 µmol/s | 1,420 µmol/s |
| Efficacy | 2.8 µmol/J | 2.9 µmol/J |
| Coverage | 5x5 ft | 3x3 ft |
| Spectrum | 660-665 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 |
| Water rating | IP65 | - |
| Weight | - | 14.6 lb |
| Warranty | 5 years | 5 years |