Doug, the light I mentioned above has a slide switch, no pressure switch. The lithium batteries should be good for 10+ years, at least as long as the adhesive on the duct tape. I don't know what the light costs wholesale but presumably it's less than Countycomm's $1.00 retail price (after 10 years, the batteries aren't dead, they're just no longer as good as new). I'm not trying to make a sales pitch for Countycomm but just wanted to make sure you were aware of this particular unit. I have a bunch of them and I'd be happy to send you one if you want to evaluate it.

03lab, my review of the CC3 "super tough" light is here. It's basically the same size as the CC2. It's more rugged than the CC2, but is unsuitable for this PSK because of its pressure switch, as Doug explained, plus, it's momentary-only. I think the CC2 is fine for this kit. Any impact strong enough to damage the CC2 will bend or break other stuff in the kit as well, like the mirror, the needles and fishhooks, etc. The CC2's main bug is that if you drop it with the LED pointing down, the weight of the batteries can make the switch slide forward and turn the light on when the light hits the ground. In a PSK, there's a simple cure, which is simply put a piece of tape over the switch til you want to use the light. You could even use a printed label "sealing" the light, so if the label is intact, you know the light hasn't been used and that the batteries are fresh.