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Grow Light Measurements Explained - Lumens, Lux, PAR, PPF and PPFD
Lumens and lux tell you how bright a grow light appears to the human eye, but PAR, PPF and PPFD are more useful when comparing light intended for plant growth. If you are choosing an LED grow light, understanding these measurements helps you select a fixture that suits your growing area rather than simply buying the highest wattage or brightest-looking lamp. Modern LED grow light listings often include terms such as full spectrum, PPF, PPFD and μmol/J. These specifications can appear complicated at first, but they answer practical questions: how much useful light does the fixture produce, how efficiently does...
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