Quote Originally Posted by demoreal
Does anyone know what the light compensation and saturation levels are for cannabis? It is obviously dependent on other things such as co2.
The article did bring up my question on UV stating research is leaning towards the side that it is beneficial towards things such as development of flavors, colors, and fragrances.
In urban garden issue 9 they state that Plasma International's sulfur plasma grow light produces almost no UV.
Is UV beneficial?
Has anyone experimented with supplemental UV lights?
What kinds of lights give off UV?
I read cfl's and MH do, but I do not know how much.
What about LED's?
How about sticking a lizard light in a grow room?
The light levels differ from strain to strain. I had a white widow that couldn't stand being anywhere close to the HPS while the purple kush and original hindu skunk I had just loved it. UVB is known to be beneficial in tomatoes for production of aromatic oils so I wouldn't be surprised to see it enhancing flavors and scents in other plants, on top of being beneficial for the production of your favorite desired cannabinoid. I've used T5HO lights with UVB output to supplement the lower buds on plants, and those buds were by far more potent than the larger HPS colas above. MH gives off some, as do CFLs, but mostly they use special glass that filters out the vast majority of non-visible light. Halogen lamps put off a fair amount of UV and are not shielded, and a friend of mine too cheap to got lights had me set him up with 3 40w actual CFLs and a 250w halogen he had in his garage. He got some very sticky and dank buds, smallish, about thumb-sized, but they were uber-dank. Lizard lights would work as well.