Halogen, xenon, LED headlights, who is better?

2021-04-23 08:43:24 lighting 6

Halogen headlights

Tungsten lamps filled with halogen elements or halides such as bromine and iodine are called halogen lamps or halogen tungsten lamps. Halogen light source is one of the common car light sources. Generally speaking, they are called halogen headlights. Because the main component of the lamp body is tungsten, it is also called tungsten halogen lamp or quartz lamp. Evolved from ordinary incandescent lamps, it can be said to be a new generation of incandescent lamps.

Principle of luminescence

The halogen lamp is a variant of the incandescent lamp, and its basic light-emitting principle is the same as that of the incandescent lamp, and both are light sources of thermal radiation. The difference is that the glass shell of the halogen lamp is filled with some halogen gas (usually iodine or bromine). When the filament receives current from the car, the temperature can reach 2500 degrees Celsius. Light is emitted from this process of incandescence.

advantage

The structure is simple, the cost is low; the brightness is easy to control and adjust; the light has good color rendering and strong penetrating power; it has longer service life, higher color temperature and higher luminous efficiency than ordinary incandescent lamps.

Disadvantage

The luminous efficiency of the halogen lamp is not very high; the halogen bulb generates a lot of heat, and the waste of energy is very high; the light source is not concentrated and cannot be easily concentrated.

Xenon headlights

The first thing to note is that many people refer to "xenon" as "hernia". It must be remembered here that "xenon" is a chemical gas with inactive chemical properties, and "hernia" is a disease commonly known as "small intestine gas". The xenon lamp refers to a high-pressure gas discharge lamp that is filled with a mixture of inert gases including xenon and does not have the filament of a halogen lamp, referred to as HID xenon lamp, and can also be called heavy metal lamp or xenon lamp. It has a very tall name in the automotive field called "HID gas discharge headlights."

Principle of luminescence

By filling a variety of chemical gases, such as xenon and other inert gases in the anti-ultraviolet crystal quartz glass tube, and then using a supercharger to increase the 12 volt power supply instantly to 23000 volts, under high voltage, the xenon gas will be ionized and the power supply A light source is generated between the two poles.

advantage

The brightness is three times that of halogen lamps, which can greatly reduce night driving accidents; the color temperature is high, and the color temperature of 4000-12000 can be produced, which is close to the color of noon daylight, which is acceptable to human eyes; long life; low power consumption.

Disadvantage

Compared with halogen lamps, both cost and maintenance costs are higher; xenon lamps require the internal gas to reach a certain temperature for light emission, which causes a certain delay; after the light is emitted, the color temperature is higher, and the light of xenon lamps Penetration is not good.

LED headlights

LED headlights are lighting fixtures that use LEDs as light sources. LED is an abbreviation, the full name is called Light Emitting Diode, this thing is translated as "light emitting diode". This is a solid-state semiconductor device whose ability is to directly convert electrical energy into visible light. Depending on the material of the inorganic semiconductor, the color of the visible light emitted is also different. LEDs were the first to appear on mobile phones, computers, and TV screens. When LEDs were just beginning to become popular, electronic devices carrying this technology were not cheap. LED light sources have gradually become popular in offices, homes, and other places where lighting is used due to energy saving, long service life, and soft and non-glaring light. Now, cars are also beginning to popularize.

Principle of luminescence

LED is a solid semiconductor component. When these semiconductor materials are energized, only part of the electrical energy will circulate through the semiconductor materials, and the excess energy will be released in the form of light, thereby directly converting electrical energy into light energy.

advantage

Strong reliability, long service life, high lumens per watt; solid and simple structure, not easily affected by vibration; fast response speed.

Disadvantage

High cost; LED clusters have high heat dissipation and are easily damaged.

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