Quote Originally Posted by LIP
How the Sunlight Effects Plant Growth

200 - 280 nm UVC ultraviolet range which is extremely harmful to plants because it is highly toxic.
280 - 315 nm Includes harmful UVB ultraviolet light which causes plants colors to fade.
315 - 380 nm Range of UVA ultraviolet light which is neither harmful nor beneficial to plant growth.
380 - 400 nm Start of visible light spectrum. Process of chlorophyll absorption begins. UV protected plastics ideally block out any light below this range.
400 - 520 nm This range includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis. (promotes vegetative growth)
520 - 610 nm This range includes the green, yellow, and orange bands and has less absorption by pigments.
610 - 720 nm This is the red band. Large amount of absorption by chlorophyll occurs, and most significant influence on photosynthesis. (promotes flowering and budding)
720 - 1000 nm There is little absorption by chlorophyll here. Flowering and germination is influenced. At the high end of the band is infrared, which is heat.
1000+ nm
So if I want to plant a NON autoflowering strain outside (White Rhino) but dont want it to stink too badly or grow bloody massive, I want to plant it in the middle of summer? I thought that flowering was always induced by the light cycle changing - not by the wavelength of the light? Or is it influenced by both?
Swizzy89304 Reviewed by Swizzy89304 on . All you need to know about lighting Ok, this is from www.medical-marijuana.ca and shows just how much differnce the type of light you buy will make with your harvest. Light for Plants Without light, plants cannot grow. In the countries in which marijuana grows best, the sun is the source of light. The amount of light and the length of the growing season in these countries results in huge tree-like plants. In most parts of North America, however, the sun is not generally intense enough for long enough periods of time to Rating: 5