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

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

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

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

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. They're often used in machines and elevators.