Last night i fitted space wired APC inside a Osram Centra bulb (diameter 80mm and length 160mm).
It's controlled whit two LDR's they need to be at very dark to start oscillating at audio frequency, so it's kind of optimised for gigs at dark places. It has also microphone stand adapter.
thre is a short video clip on youtube:
I also cutted some bigger bulbs, so more of glasware-electronics are here soon.