What is the overall length of the bulb? There is some pretty good help
identifying minature lamps at
http://www.sunraylighting.com/technicalinfo.shtm .
If the glass part is round and is 3/4 diameter, then it is a g6.(lamps in
the US are mesaured in 1/8th, thus 3/4 would be 6/8, or a g6). So, we have
g6 double contact at 120 volt. I have never seen a double contact bayonnet
lamp that was 120 volt. Are you sure that there is not a step down
transformer before the lamp? At the same Sunray site you can download their
catalogs as pdf files for review. Post back and let me know what you come up
with. You should be able to put a meter on the contacts in the socket if you
are not sure of the voltage. Just be careful,they are pretty close together.



wrote in message
oups.com...
I have an indicator on my phase converter. Salvaged from somewhere.
It is a 120 volt bulb, 3/4 inch diameter, and a double contact bayonet
base. The base is 15mm diameter.

I tried for hours to find any conversion from dimensions to bulb
number. No luck.
Can anyone shed some light on where the specs are located for the
various
bulb types?

The catalogs and web pages list hundreds of types of bulbs, and what
base they have, but not the dimensions of the base standards!
How many sizes of bayonet bases are there?
Where can I get one replacement bulb?

Thanks in advance.
Pete