My friend has 2 150 MH with XM 20000K and they are amazing! I am still debating on whether or not I am getting MH. I just need to figure out all of the heat situations.
this is what i did . i made my own canopy and left the top off they really arnt hot i can touch the reflectors and its just realy warm just keep the good distance above your tank. also you can see a pic of my 125 with them on really cool!