You've all been very helpful.
One last question:
Anyone know how or why WBB is able to charge around $15 for 50 of the bulbs when the Chicago miniature bulbs are .67 when you're buying 100 or more?
Not complaining, but this is a great price, I haven't been able to find miniature bulbs anywhere else at this price.

Thanks for the info guys. If WBB uses the #53 bulb, why do they list it as 12v whereas the Chicago Miniature catalogue lists them as being 14.4v? Not a big deal, just curious.

I was wondering if anybody could tell me the size of these bulbs in inches, mm, or or the standard light bulb size classification.
Also, what size socket works with them and if anyone could point me in the direction of finding sockets for these bulbs.
Thanks.