Here is a place selling bulbs. Use low wattage (3 or 5 watts) so nothing is damaged from heat.
http://www.1000bulbs.com/search/?q=3+watt+light+bulb
Norm
:It appears to be a 115 volt bulb, so it is probably something like a sewing-machine lamp or a night-light
:bulb. Is it a bayonet or screw-thread base?
:
If it is an E12 socket and is 115V you can get LED versions from most stores these days they sell them for night lights. The same is true for the E14 socketed bulbs often used in candelabra style lights and for the E26 socket as well.
The number after the "E" is the approximate size in millimeters of the bulb base.
Richard