a plant can only handle so much light ... after a certain point, the excess light will interfere with photosynthesis and processing of chlorophyll ... at least, thats the explanation I got, after bleaching some young seedlings pure-white ... that Lexus beacon you speak of, was drastically dimmed, shortly after it's premiere, by the way ... it's not all that spectacular anymore (airline pilots complained to the FAA that they were being blinded, in their landing approaches at LVIP) ... was pretty awesome for awhile, though ... :jointsmile: