A solution I occasionally used was a small cap made of the paper used to wrap pieces of expensive crockery. Problem is that luminosity will be reduced. (As far as I know, difusion entails reduction always...)
Hi again,
Yes, the LED output is reduced unfortunately. I was hoping to work with the tradeoff between good mixing and not too bad light output reduction. I guess it just takes experimentation that's about it.
Havent broken out the Polymorph yet either because i've had other things to do, but i am pretty sure that will work for indoors. Outdoors is a problem because that stuff cant take the heat too well and melts too easy. I tried some in the car once and it melted. Indoors probably ok though. It gets funny looking too if handled a lot but the LED cap will not have to be handled after it is installed.