Sal..... Also could I put some kind of blue filter like (colored cellophane) on my glass lens and filter out blue light from a 400w bulb. I want to use this life light 4k CMH bulb from the pic below. I like the amount of red and far red in the bulbs spectrum but I don't like the amount of blue. Could I filter that out somehow. I know the tempered glass I'm using now filters out some of the blue but more then likely I want more of the blue filtered out of this bulb for flowering and the martin method. Thanks again for your time.