The coralife is hqi this is mogul. 2 different kinds of mh.hey im looking at getting a MH light and i found a coralife aqualight 150W for 300 dollars, this is half that price. why do you think there is such a price gap? looks like you have been running this for two months, how is it so far? i wont be able to hang it from my ceiling so i would be using the mounting arms. do they look durable? which way do you have it mounted?