i am currently upgrading the lighting on my 180. currently i have 3 175 mh and 2 72" vho. i am changing the 175 w mh to 250w. i have been trying to decide what lamps to use and have been studying the spectral plots of various lamps and do not know what to go for. my question is this "what lighting wavelength is best for sps? xm bulbs have a spike @ about 420nm the reeflux has it's spike @ about 450nm and the ushio is the same as the xm but lower par. should i be more concerned with par or wavelength?
frankie1
frankie1