There ya go. They would be great for that...no battery draw. We can run 6 on one battery for 8 hours easy.
Dont let the fact they are from China bother you. We got them in about 2 weeks and they are VERY well made. Cooling fins on the back are cast and powder coated. They weigh about 2lbs apiece. Very sturdy construction.
http://www.dhgate.com/6pcs-4-quot-in...8ed0373ab.html