i use 600w soduim for flowering, but have read that if you can get a bit of blue light at the end it improves the power and density of the flower. my rooms runs bang on so addinng a halide would fuck up my temps, so i thuoght i mite get me sen some of those CFLs in blue. anyone had experince , would it make a diffrence, or should i save me penneys

does anyone sell inline carbon filter

I wouldn't do it. If anything get a reptile light that puts out UVA and UVB. Do some research here in the lighting forum on those.

I use MH in addition to HPS for flowering. Details are in my 2nd grow, the link is below.

try google. also type in greens horticulture.