3×3 ft (90×90 cm) Grow Tent Light Guide — 200–300W LED & PPFD
Lambertian simulation with effective Mylar wall reflectance (50%) across a 90×90 cm (0.81 m²) floor. No guesswork tables and no brand bias.
- Fruiting LED: 200–300 W (~640 µmol/m²/s · 16 h)
- Herbs & Greens LED: 115–150 W (~300 µmol/m²/s · 14 h)
- Floor area: 0.81 m² (90×90×180 cm)
Photometric comparison of compatible fixture classes
Simulated by the physics engine at 16 h/day and a reference tariff of 0.25 €/kWh. Estimated · ±20% margin.
| Fixture class | Form factor | Wattage | PPFD | Min–Max | Uniformity | Safe clearance | Cost/mo |
|---|---|---|---|---|---|---|---|
| Full LED Panel 260W (702 µmol/s) | Compact panel | 260 W | ~640 µmol/m²/s | ~250–1200 µmol/m²/s | 39% | ≥ 30 cm | ~31 € |
| Quantum Board Pro 200W (553 µmol/s) | Compact panel | 200 W | ~510 µmol/m²/s | ~190–1000 µmol/m²/s | 38% | ≥ 30 cm | ~24 € |
| Compact LED Bar 300W (856 µmol/s) | Spread bars | 300 W | ~750 µmol/m²/s | ~330–1200 µmol/m²/s | 44% | ≥ 20 cm | ~36 € |
| Quantum Board EVO 200W (542 µmol/s) | Compact panel | 200 W | ~490 µmol/m²/s | ~190–930 µmol/m²/s | 39% | ≥ 30 cm | ~24 € |
| Medium LED Bar 300W (854 µmol/s) | Spread bars | 300 W | ~760 µmol/m²/s | ~320–1300 µmol/m²/s | 42% | ≥ 30 cm | ~36 € |
Arranging mixed species in this tent
Use the natural PPFD drop-off from center to corners: place light-hungry fruiting crops (tomato, pepper, strawberry) directly under the center and herbs or shade-loving houseplants near the edges.
Tomato · Pepper · Strawberry