PLT's 258 flasher mini indicator lamps are designed for long lasting and reliable performance. With a miniature screw (E10) base and G4.5 bulb shape, this PLT lamp has high quality components and is easy to install. This mini indicator lamp operates at 14 volts and 0.27 amps and is typically used in train applications. With an average life rating of 500 hours, this bulb will last for many miles and is suitable for all types of weather. Please note that this bulb does not burn steadily, it flashes.