Headlight Bulb in Chevrolet Trailblazer cars plays a very important role of lighting the road ahead during night or in dark side of the day. There have been a number of types of Headlight Bulb used including Halogen and HID (High Intensity Discharge) bulbs. Halogen bulbs which are made of a tungsten filament reduce in brightness over time, while HID bulbs work on the principle of an arc between electrodes that ignite xenon or metal halide gas, also undergo dimming and cycling problems. For those in search of a better illumination, the upgraded Halogen bulbs will provide 50% better lighting and field of view to the side and are perfect for use at night or in areas with poor visibility. On the other hand, LED headlight conversion kits come with better illumination, broader patterns and longer lasting thus making it a durable produces. These LED options can be used with different types of headlight set ups and may even include color shift for different appearances. Bulbs used in headlighters require replacement often so that maximum visibility and safety can be achieved.