Definitely. Check out the Lumileds website for application notes and links to some people who have developed specialized drivers for the Luxeon series. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams On 9/24/05, mrgizmo wrote: > Is there any way to drive a 3 W luxeon star without using a huge power > risistor. 3.7V at 700ma or 3.9V at 1000ma. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist