my 3 mercury vapor lights are a form of hid lighting, highly used before metal halide came around. from what i've read they are excellent for the veg state but wrong spctrum for flower as they tend to be too blue. is that true and where can i find a 400w hps system? i havent seen them in any hardware stores
due to circumstances i may have to use my current light set up for flower. any ideas as to what i can expect or tips to improve with out spending a fortune?