CONSTRUCTION
Instead of the filament contained in an incandescent bulb, a discharge bulb contains an arc tube, which is filled with xenon gas, and metal halide.
| *1 | Arc Tube | *2 | Lead Wire |
| *3 | Ceramic Pipe | - |
Discharge bulbs have the following advantages:
The light emitted by the bulb is close in color to sunlight. The light shines ahead over a broader area and further forward, increasing the area visible to the driver.
Less power is consumed.