NOTE: For replacements, order a PACK OF 10 from PARTS PAGE (As of 2020, Amazon no longer carries 10pk)
A 10 pk should tide you over till the next Millennium. NOTE: This bulb is used in the Night Light, too 
NOTE: Now recommend #47 lamp • 6.3V, 150mA • T 3-1/4 bulb • 10mm bayonet base ~ kh