How are you at woodworking?You will need to build a canopy/fixture to mount the reflector/halide in.You might be able to find a place online that sells them but they tend to be expensive.I built both of my canopys for my 2 tanks for only $60.Where are u located at?You should look into joining a reef club in your area where you might be able to enlist the services of one of there members.Or just start a thread here,there's more than enough DIY guys on this site that can help you with the design/buiding of it.
BTW,glass tops are to be avoided in tanks,most of the gas exchange in your tank takes place at the waters surface.Glass tops hinder this process as well as block out useable light.