In art. . com, Matt wrote:

I googled for this, and got a couple hits, but thought I would ask
here.

I finally got my 1A2 phone system up and running..... and now it's time
to 'customize' it.

I'm thinking I want the lights to be blue instead of clear. When I was
a kid, I remember buying light bulb paint at radio shack; wondering if
anyone here knows where this could be obtained nowadays.

If I can't find that, I'm thinking I could also get something working
with something like the gels they use in fresnel lights.

Or any other ideas? These are pretty small bulbs, but also very bright.
Heat won't be an issue.

If you are sure they don't get truly hot to the touch, then you can use
"Colorine", available at some theater supply shops.

Otherwise learn how to use LEDs there (connect DC only and only through
a resistor of the proper value and wattage, don't try to match voltage to
avoid a resistor), and get blue LEDs.

More on powering LEDs: http://www.misty.com/~don/ledd.html

- Don Klipstein )