Efficacy, CRI & Power Factor

Efficacy Efficacy is also known as PPE, or Photosynthetic Photon Efficacy. Efficacy measures the amount of photons emitted by the grow light per input watt. You can calculate the efficacy (µmol/J) by taking the amount of PAR photon output (µmol/s) and dividing that by the input power (W). An higher efficacy means that the grow light is better at converting electrical energy (or watts) into usable photons, which are very important for photosynthesis.   Color Rendering

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