one of em come with a MH light, otherwise you could hack in a viper or coralife into the top.....currently I am going topless with one using the viper(via Karl), I put to MJ900s through the baffles and plan on putting some chaeto in the there sometime, I may fab a clear or smoked cover eventually or a fully enclosed piece just for the back with an incorporated light for the chaeto.......going topless is the easiest way.......big heat issues otherwise......you may fab a top out of acrylic if the kiddies are going to be a concern, but watch how close you put the light to it.....it will burn.....