We drive them with 12v, this isn't a homemade drop light but a prototype from a company, plugs into the 12v socket or I can hook it up directly to a battery . SUPER bright and 0 heat ( well less than shop), used a temp gun on it never above 79* which is what we keep the shop at. Again I'm just askin so I know if I really need the alum. heat sink they sell. I see Micki used two strips which I have plenty of so I guess it won't hurt to use them but I'd rather not if I don't have to.