I just usea plain white light in a pocket size mag-lite or whatever, but only when necessary. It is odd how in some places the deer will spook if they see it and others they have no idea what it is and completely ignore it. I assume that some have learned what is behind the light and others have not. I actually watched two bucks fighting from about30 yards walking to my stand in the dark last fall on the family farm. They couldn't see beyond the light so they just ignored me completely. It was amazing. I was able to keep the light on them and walk right past (well more like creep). One of my neatest hunting memories. Never would have seen it if I wasn't a hunter.