Coyotes react very differently to brighter or dimmer lights. The same can be said for lights that are more "white" versus lights that are more "red". Red lenses actually restrict the amount of white light that comes through- there are a wide variety of lenses on the market.

Celephane will result in a pinkish cast- which is better than white.... but still not great coyote equipment. This idea, among others, will work very well for fox but is not consistantly succesful on coyotes. I like my lights like I like my steak, the redder the better.