i'm running a 400 watt 20k currently and find it to be only a tint of blue (however many would think i'm crazy as for many it's way too blue) IMO, but if thats what you're looking for it's a great bulb. i've heard from many lfs' that radiums give you a much deeper blue than xm's, no experience with them however. xm's are on the lower side of PAR i'm pretty sure though, as far as halides go-
Last edited by bv_reefer; 05-07-2008 at 05:57 PM.
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