PPF, PPE, PPFD, DLI and Power,are the main parameters we when we talk about LED grow lights.
| Abbreviation | Full Name | Unit |
| PPF | Photosynthetic Photon Flux | umol/s |
| PPE | Photosynthetic Photon Efficiency | umol/j |
| PPFD | Photosynthetic Photon Flux Density | umol/(s*m²) |
| DLI | Daily Light Integral | mol/(m²*d) |
| Power | w |
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