I guess I'm a bit late but if you're after glow powder I'm happy to help! /ubbthreads/images/graemlins/smile.gif
Is there any way you can see Raggie of placing a 3mm LED facing inwards as well to charge the glow powder from inside the unit? I feel this would give you a better glow and make charging the powder a bit easier too. Only downside is the effect on the battery.
Another thing, it will depend on the original colour of the light's body as to how effective the final glow result will be. If they are clear bodies this will work the best. Coloured bodies will tend to filter out some of the 'oomph!' the glow powder provides. Some testing will quickly sort that out though.
May I make a suggestion?....
If you use the nail polish like Kevin wrote, it would be better to do a couple of thin coats rather than dust the outer layer of the polish due to the nature of the beast. GID powder needs light photons to activate it and if the surface area of available powder is small/thin, then you'll get a small/thin amount of powder to charge - giving consequently less glow potential.
The beauty of nail polish, for example, is that it allows the powder to be evenly(pretty much) distributed throughout the polish. This allows, after application in particular, more glow powder to be applied AS WELL AS more light to penetrate to charge the powder. MORE GLOW POTENTIAL! /ubbthreads/images/graemlins/smile.gif
A 30% ratio of powder to medium is what I have been recommended with my powders.
I'll leave it there - I hope I was able to help a bit without being too over the top /ubbthreads/images/graemlins/wink.gif
Later & good luck Raggie!!
Tim.