Here is the visible part of the spectrum.
Plants are green, which means that Plants
absorb light at the middle of the spectrum
(Orange to Indigo). Cannabis plants need this
part of the light spectrum to reach full
growing potential. The intensity of the light
is also important. A light that feeds the full
bandwidth with all light spectrums will work
very well - like sunlight. When dealing with
artificial lights it is better to choose a
light that concentrates its intensity on the
top part of the spectrum. The most common
indoor light systems are called HID lights. We
will discuss the full range of lights that you
may come across in some grow rooms.
