Pins on either side of the base lock these bulbs into sockets. Pins are directly across from each other.

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

These bulbs are sized to fit tight spaces such as signs, control panels, indicators, and flashlights.

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

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

Often used in recessed can fixtures and track lighting, these bulbs produce a focused beam of light. Beam angles range from 25° to 120°.