Mars Hydro FC-E3000
#1 in 300 W and upFull review
A good value, water resistant bar light for a 3x3 ft tent of fruiting vegetables.
Amazon $169.99$169.99
The Mars Hydro FC-E3000 is the better LED grow light overall, rated 4.6 to 4.5. The Mars Hydro FC-E3000 leads on features. The Mars Hydro FC-E3000 costs $20 less ($169.99 vs $189.99).
Spider Farmer G4500
#3 in 300 W and upFull review
A good value bar light for a 2x4 ft tent of vegetables, with app control and far red included.
Amazon $189.99$189.99
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.
Which should you buy?
- Choose the Mars Hydro FC-E3000 for features (dimmable, controller or app, IP65 or better vs dimmable, controller or app).
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-E3000 | Spider Farmer G4500 |
|---|---|---|
| Overall rating | 4.6/5 | 4.5/5 |
| Value 30% | 82 $0.20 per µmol/s ($169.99, 840 µmol/s) | 80 $0.21 per µmol/s ($189.99, 913 µmol/s) |
| Efficacy 30% | 80 2.8 µmol/J | 85 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-E3000 | Spider Farmer G4500 | |
|---|---|---|
| Light | ||
| Power draw | 300 W | 320 W |
| PPF | 840 µmol/s | 913 µmol/s |
| Efficacy | 2.8 µmol/J | 2.9 µmol/J |
| Coverage | 3x3 ft | 2x4 ft |
| Spectrum | 660-665 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 | Multi-bar |
| Dimmable | Yes | Yes |
| Controller or app | Yes | Yes |
| Water rating | IP65 | - |
| Weight | - | 10.2 lb |
| Warranty | 5 years | 5 years |