At least newbie Ed Rosenthal understood and now recommends 24 hours of blue LED throughout the entire grow cycle.

I am amazed at the close-mindedness and lack of understanding of cannabis photoperiods or real attempt to understand something new.
RackitMan Reviewed by RackitMan on . Blue light after 'dark'? Has anyone here tried using pure blue light (LED or actinic fluoro) during the 'dark' or night phase when in 12/12 light cycle to keep photosynthesis going without interrrupting the flowering phase? I have one of the newer 50 watt blue LED panels and may give it a try, but would like to get some feedback first. Rating: 5