I purchased two photon32's from ReefBreeders website about a year ago. They are setup on my first sps/lps tank (a 210gal). I am still young in keeping coral so I can't really comment as far as if it is growing things as well as say MH or T5. Everything seems happy and growing under them though. I have some acro's up high that are putting on new branches (they were bought as tiny little 1/2" frags and have fully encrusted the plug and added branches now). Monti's are growing fast it seems. Haven't had any bleaching issues to speak of with my setup. I never really debated the led vs MH options as I was unwilling to pay the higher premium to run metal halide (replacing bulbs, needing a chiller, higher electric bill) so leds were my only choice and so far so good.