They are a ready made recessed fixtures, complete with reflector, and bezel. They are sold in 2 ways. The basic fixture is made for 12v. But there is a 120VAC adaptor that can be bought and put on each light. (He dont have that adaptor). He has 22 lights in two rows (presently). He is talking about installing 22 more, which means his needs would then be 30 amps at 12VDC. (But if he adds the extra lights, he would be separating it from the initial bank of batteries and solar panels.