"Bill Jeffrey" wrote in message
...
Chuck wrote:

Just count the number of bulbs that go out when you remove a bulb from a
working string...
then divide 120 volts (if in North America) by the number of bulbs in
each section,

10 bulbs would be 12 volt bulbs
20 bulbs would be 6 volt bulbs
50 bulbs or so would be 2.5 volt bulbs
These are nominal voltages, Some strings use a few more bulbs and run
not as bright.

Now that was a good common-sense troubleshooting response. Right to the
point. Excellent!

Good answer, but that wasn't his question. If I read the OP correctly, he
has a bulb in his hand (not in a string) and doesn't know which string it
goes into. In other words, he doesn't know how many volts it takes to
light this particular bulb.


Just put it in a string and see what it does. Most are either 2.5 or 3.5V,
with older ones being 6V. Even if you put a 2.5V bulb in a 6V string, it
will not usually blow instantly, you can tell if the brightness is way off
if it's wrong.