Lamp height is the height between the lamp and the top of the plant. The amount of light determines the yield. The effect of a lamp at 20 inches is four times stronger than a lamp at 40 inches.
Learn all about growing and lighting:
More lighting related terms:
Lighting | Light cycle | Dark cycle | Light shortage | Light distribution | Light spectrum | Blue light | Red light | Nanometer | Light tight | Lumen | Lux | Reflecting light |
HPS lights | HPI lights | LED lights | Compact fluorescent lights
