FAQs: Difference between revisions

The distance from the light to the plant canopy is a large factor in determining the '''intensity of light''' (umol/s) falling on the plant. This means it can be used to approximate the actual amount of light a plant is receiving ''but only'' if we know the other factors such as the light's power consumption (in Watts) and its efficiency (umol/J). While this approximation is ''possible'' it is more accurate to simply measure the light at the canopy using a [[Light#Measuring light intensity|smartphone or lux meter]]. Theand lightdo intensityaway ofwith the relevantdistance frequency for photosynthesis is called [[Light|PPFD]] and its unit is umol/s (Micromols per second)meaurement. Measuring light intensity makes it much easier to perfect light conditions even in cases where the grow light's efficiency or consumption is unknown.