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

These bulbs are sized to fit tight spaces such as indicators and vehicle lights.

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

Wire terminals allow you to connect these bulbs to a power source through a panel.

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.

Use these bulbs in standard sockets, panels, and appliances.

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