I found a Enegizer strap to your head light at WalMart that beats anything I've tried in the last 30 years. 2 red LEDs, 4 whtie LEDs. I get 2 to 3 days out of 3-AAA Kodak Ni-MH Batts that I got in the Camera Dept. All for less than half an hours labor. Login to read more.