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

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

Fit these bulbs in tight spaces such as signs, control panels, indicators, and flashlights.

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

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

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