How Does it Work?
- Electricity passes through the bulb and the electrons vibrate through the filament, creating very high temperatures.
- Automotive lightbulbs are available for headlights, LED interior and exterior lights, conventional signaling and interior lighting and accessories.
How is it Made?
- A polycarbonate plastic headlight lens covers the bulb.
- Different varieties of bulbs including Tungsten, Tungsten halogen, Halogen-infared reflection (HIR), and High intensity discharge (HID).
Why Does it Fail?
- Glass breakage.
- Long term failure- the filament is so fatigued that it's electrical resistance increases to the point the current won't flow.
- Sealing failure occurs when oxygen enters the bulb.
- Thermal Shock- the most common- when you turn it on, the bulb flashes brightly and dies.
What are the Symptoms of Failure?
- Flickering Bulbs.
- Burned out bulbs.
What are the Implications of Failure?
- Lessened ability to see at night.
- Making unsafe turns due to signal light being out.