These bulbs are small, but very bright, so they're often used in flashlights and optical instruments such as projectors and microscopes.

Pins on either side of the base lock these bulbs into sockets.

Bulbs have two filaments, which operate at different brightness levels.

Often used as status indicators, in displays, or to check circuit function in prototyping and testing, these bulbs have wire terminals to directly install onto circuit boards.

These miniature bulbs are sized to fit older telephone switchboards, signs, instruments, and indicators.

Offset pins on the base lock these bulbs into sockets. One pin is slightly higher on the base than the other pin.

Pins on the base lock these bulbs into sockets to withstand vibration.