LEDs (light-emitting diodes) can be used to influence the development of indoor plants. Different colors of LED are more appropriate depending on the stage of plant development. Blue (450nm) is ideal for accelerating vegetative growth, while red (630-660nm) promotes budding and flowering. White LEDs are necessary to provide visibility and detect plant health problems. The ultraviolet spectrum is rarely used, but can be used for a short period to increase THC content. It is important not to...