Needless to say, the worldwide production of conventional or incandescent lights has been almost phased out by the introduction of and the subsequent demand for more energy-efficient lighting technology. Brighter headlights illuminate the road better, especially at night making night driving less stressful. It makes objects in your way more visible at night. You also get to see your way in a greater distance.
Halogen lights are most common in the market and are found on most cars. These bulbs are similar to incandescent lights and use heated tungsten filaments to produce light. Halogen lights produce a significant amount of heat, and even small deposits of skin moisture on the bulb during replacement can affect their performance. Halogen bulbs became popular because of the fact that they are usable for reasonably long durations and their replacement costs are low. They produce standard light and are available in various sizes, which in other words means, they can be mounted on almost all models. They, however, generate a large amount of heat because they use a mix of gas and an electricity-generated filament to produce a luminous effect. It is also recommended to wear latex gloves when they are touched as they are highly reactive to various elements including the oils on your skin.
Laser car headlights were first introduced in the BMW i8. They provide brilliant white light to illuminate the road ahead. US regulators are still hesitant to allow mass adoption of laser headlights because of a 1968 rule prohibiting high beams that can't be manually shut off.
Xenon or HID lights produce a brighter light than halogen bulbs and with far less heat but the blue-white light emitted by these is so bright that it had a blinding effect on other drivers. They replace the filament with a capsule of gas. Light emanates from an arc discharge between two closely spaced electrodes. This discharge is hermetically sealed inside a small quartz glass tubular capsule. A ballast is required to regulate the voltage. The light produced is greater than any halogen bulb.
Bi-xenon lamps use just one xenon lamp for the high beam, which is then either moved or shaded each time a low beam is to be provided. Thus, a bi-xenon lamp is sometimes cheaper and also takes up less space in the lamp unit.
LED headlights work on an altogether different principle than the rest. There’s no filament. They transfer current through a semiconductor. This movement of electrons through a semiconductor emits photons producing light, making them a lot more efficient than halogen bulbs. Comparatively, they also generate significantly less heat and offer better durability. Operating temperature of these lights if maintained within limits, they could even run indefinitely. We may safely claim 20,000+ hours of operating life. They require a lower voltage than halogens and give a brighter and whiter light. It’s also possible to alter the colour by changing the physical properties of the semiconductor.
For intense light and if you don't mind the glare, xenon may be the best choice. You nevertheless need to confirm whether they are legal wherever you intend to go driving. LED bulbs meanwhile, offer great light, low power and long life, but may come with a bigger price tag. Halogens are history.