Re: Lens cover for Mag D cell lights?
Easiest and cheapest way to go is a plastic bag and a rubber band.
They work, are replaceable for nothing, and come off fast with the added benefit of not having to care (or worry) about 'em.
I used to do this with camera lenses since they would let me see what lens was on the camera. Also, if needed, I could use a larger bag, put a filter on the lens, and by doing that, cut out the plastic bag around the lens, ending up with a weather resistant camera cover. You get pretty creative when you're too cheap to spend more money on something.
- (a different) Craig