Photosynthetic Photon Efficiency (PPE) Calculator
Photosynthetic Photon Efficiency (PPE) is a way to measure how efficiently a light fixture converts electrical energy into photons. If a light has high PPE, it means the light efficiently converts the power you are paying for into light that can grow your plants.
In general, it’s good to use lights with high PPE, assuming you have a spectrum that’s right for your plants. We generally recommend a broad spectrum.
Overall, LED lighting solutions have higher PPE than HPS or HID lights because they deliver more PPF, for a given amount of power, making them a more efficient choice for your grow.
To learn more about PPE (as well as PPF and PPFD), read our article on PPF, PPE & PPFD: Definitions & Applications in LED Lighting.
You can get PPE by dividing PPF by power (W), so PPF/W = PPE and you express the result in micromoles per Joule (µmol/J). Use the calculator below to calculate PPE from PPF and power (W).
μmol/s
W
µmol/J
