4×4 ft (120×120 cm) Grow Tent Light Guide — 300–450W LED & PPFD
Lambertian simulation with effective Mylar wall reflectance (50%) across a 120×120 cm (1.44 m²) floor. No guesswork tables and no brand bias.
- Fruiting LED: 300–450 W (~730 µmol/m²/s · 16 h)
- Herbs & Greens LED: 200–300 W (~300 µmol/m²/s · 14 h)
- Floor area: 1.44 m² (120×120×200 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 |
|---|---|---|---|---|---|---|---|
| Commercial Quantum Board 450W (1420 µmol/s) | Compact panel | 450 W | ~730 µmol/m²/s | ~280–1200 µmol/m²/s | 38% | ≥ 20 cm | ~54 € |
| Modular LED Bar 300W (942 µmol/s) | Spread bars | 300 W | ~520 µmol/m²/s | ~150–1200 µmol/m²/s | 30% | ≥ 30 cm | ~36 € |
| Full LED Panel 430W (1183 µmol/s) | Compact panel | 430 W | ~650 µmol/m²/s | ~200–1400 µmol/m²/s | 30% | ≥ 30 cm | ~52 € |
| Modular LED Bar 280W (879 µmol/s) | Spread bars | 280 W | ~470 µmol/m²/s | ~150–1000 µmol/m²/s | 31% | ≥ 30 cm | ~34 € |
| Elite LED Panel 330W (950 µmol/s) | Compact panel | 330 W | ~510 µmol/m²/s | ~160–1100 µmol/m²/s | 30% | ≥ 30 cm | ~40 € |
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.