2×4 ft (120×60 cm) Grow Tent Light Guide — 200–320W LED & PPFD
Lambertian simulation with effective Mylar wall reflectance (50%) across a 120×60 cm (0.72 m²) floor. No guesswork tables and no brand bias.
- Fruiting LED: 200–320 W (~640 µmol/m²/s · 16 h)
- Herbs & Greens LED: 115–150 W (~300 µmol/m²/s · 14 h)
- Floor area: 0.72 m² (120×60×180 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 |
|---|---|---|---|---|---|---|---|
| Long LED Bar 300W (727 µmol/s) | Spread bars | 300 W | ~640 µmol/m²/s | ~330–890 µmol/m²/s | 51% | ≥ 30 cm | ~36 € |
| Full LED Panel 260W (702 µmol/s) | Compact panel | 260 W | ~630 µmol/m²/s | ~240–1100 µmol/m²/s | 38% | ≥ 30 cm | ~31 € |
| Advanced LED Bar 320W (928 µmol/s) | Spread bars | 320 W | ~790 µmol/m²/s | ~430–1000 µmol/m²/s | 54% | ≥ 20 cm | ~38 € |
| Modular LED Bar 280W (879 µmol/s) | Spread bars | 280 W | ~780 µmol/m²/s | ~360–1100 µmol/m²/s | 46% | ≥ 30 cm | ~34 € |
| Quantum Board EVO 200W (542 µmol/s) | Compact panel | 200 W | ~500 µmol/m²/s | ~200–840 µmol/m²/s | 40% | ≥ 30 cm | ~24 € |
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.