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Light & DLI
PPFD, light hours, DLI and lux approximation
Lux meter reading
lx
Required
Factor 0.015 µmol/m²/s per lx (approximation for white LED and HPS, ±20 %). In the Growlog the calculator uses lamp type and spectrum.
Estimated PPFD
–µmol/m²/s
Calculate with your own data
In the Graswiese growlog the calculators fill themselves from your grow diary: latest readings, lamps, mixes from your inventory – free and usable offline.