i have a 75 with 2 oddysea 260 watt pc and i have a clam on my sandbed he seemed to luv it i had those lights for a year and a half i just upgraded to mh but i kept leather,frogspawn,hammer,plate corals,anemones,gsp,xenia,shrooms,elephant ear coral a seapen,torch and everything did fine but in the last month or so with the new mh and i cant even believe how much groth there is the xenia is like a weed and the gsp is just as bad so if you can save a lil money and just buy mh do it its worth it i need to find these pc a good home or does anybody have any good ideas for old pc lights?