Pins on the base lock these bulbs into sockets to withstand vibration. They're often used in machines and elevators.

Small but powerful, these bulbs are commonly used in stage and security lighting.

These bulbs have a bi-pin connection to lock into sockets.

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

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

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

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

Commonly used in signs, instruments, indicators, and flashlights.

Replace metal halide, high-pressure sodium, and mercury vapor light bulbs with longer-lasting, energy-efficient LEDs.

Switch from the yellow light of high-pressure sodium to the white light of metal halide without changing ballasts.

Also known as beacon lights and signal lamps, these bulbs provide high-intensity light so they're often used in security warning devices and machinery.