the odysea mh are great once u replace the ballast and bulbs. still cheaper then any other mh/pc combo fixture. the stock ballast only put out a little more then 1/3 of the power that they are supposed to...so that sucks...but im still keeping alot of corals with the stock ballasts and phenoix bulbs. the stock ballast make the stock bulbs look yellow but if u change the ballast to something like coralvue or ice cap, the stock bulbs will be a crisp white...