tanning beds have bulbs which emit UVB. metal halides also emit UVB. HPS bulbs do not.
dHazed Reviewed by dHazed on . UVB? http://marijuana-optics.greatnow.com/ this article tells of UVBs effects on a cannabis plant... If what I read is correct, higher UVB levels dramatically increase the Thc content of plants... is this true? And how the fuck do I artificially generate that kinda light? Rating: 5