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
The Spider Farmer G4500 is the better LED grow light overall, rated 4.5 to 4.2. The Spider Farmer G4500 leads on efficacy. The Mars Hydro TSW2000 costs $20 less ($169.99 vs $189.99).
Mars Hydro TSW2000
#12 in 300 W and upFull review
A mid size panel for a 3x3 ft tent of vegetables or a 4x4 ft tent of seedlings. Buy it direct for the lower price.
Amazon $199.99 Mars Hydro $169.99$169.99
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 Spider Farmer G4500 for efficacy (2.9 µmol/J vs 2.6 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 | Spider Farmer G4500 | Mars Hydro TSW2000 |
|---|---|---|
| Overall rating | 4.5/5 | 4.2/5 |
| Value 30% | 80 $0.21 per µmol/s ($189.99, 913 µmol/s) | 77 $0.22 per µmol/s ($169.99, 776 µmol/s) |
| Efficacy 30% | 85 2.9 µmol/J | 60 2.6 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
| Spider Farmer G4500 | Mars Hydro TSW2000 | |
|---|---|---|
| Light | ||
| Power draw | 320 W | 300 W |
| PPF | 913 µmol/s | 776 µmol/s |
| Efficacy | 2.9 µmol/J | 2.6 µmol/J |
| Coverage | 2x4 ft | 3x3 ft |
| Spectrum | 660-665 nm red, 730-740 nm IR, 2800-3000K and 4800-5000K white | 660-665 nm red, 730-740 nm IR, 3000-3200K and 6000-6500K white |
| Build | ||
| Form | Multi-bar | Panel |
| Dimmable | Yes | Yes |
| Controller or app | Yes | Yes |
| Weight | 10.2 lb | - |
| Warranty | 5 years | 5 years |