Which headlights are better?
Night driving is twice as dangerous as daytime driving. Absolutely different driving conditions at dusk, at night, in fog, in rain, in snow. The safety of traffic in these inconveniences largely depends on the headlights.
Car lights are the sourcedirected light, intended for the consecration of the surrounding road, terrain. Any automobile headlight is a body, a reflector, a diffuser and a light source (gas-discharge lamp or incandescent lamp). By design, the headlights come with a movable or fixed diffuser. There are several types, types of headlights, and which lights are better, the motorist will understand with time.
Fog lights are necessary in poor conditionsvisibility: fog, snow. The main feature of the fog lamps in the direction of the light flux, which has the form of a wide and flat horizontal beam, spreading along the surface of the road for a distance of up to 10 meters. Fog lights are consecrated so as to see not only the road, road signs, but also other objects on the road. When questions arise: What are the good fog lights? Production of headlights, which company will not let you down the road ?, then the answer can not be unambiguous. The best manufacturers of fog lamps are considered by many firms OSRAM. To select quality fog lights, you must pay attention to the labeling. The world standard for quality is code 02 or letter E, the fog lamps are identified by letter B.
Many drivers have a reasonable question: "Which headlights shine better at night?" Xenon headlamps shine brighter than everyone, so if a motorist wants a real bright light in his car, it's better to put xenon. Xenon lamps are more effective than halogen lamps. Xenon brightness is 90mcd / m2, and for halogen it is 30mcd / m2. In addition, xenon lamps last two times longer, using less energy, thereby reducing fuel consumption on the machine. But even the xenon headlights have drawbacks. This too bright xenon light and glare can dazzle other drivers and lead to an accident. To prevent this from happening, you need to carefully adjust the angle of the headlamps. The cost of xenon headlights and their replacement is much higher than the cost and replacement of halogen headlights. In addition, some xenon headlights have harmful effects on human health and the environment, because they contain toxic substances - mercury.
Today, mainly halogendouble-headed headlights. The main advantage of these headlights is that the inner surface does not darken with time. These headlights are durable, with an average duration of about 1000 hours under normal conditions. The disadvantage of halogen headlamps is low efficiency at high energy consumption. The filament of the halogen lamp creates great heat, while at the same time consuming energy for nothing. The problem is that the halogen lamp reacts with other substances. Replace a faulty halogen lamp with gloves or keep a lamp with a tissue.
Types of headlights
There are three types of headlights:
- Parabolic. The most common conventional headlights with a parabolic reflector. The bulb in them is located in focus and directs a ray of light along the axis. A useful light yield of about 27%
- Reflectors. The surface of the reflector is divided into segments that are responsible for their part. A useful light yield of about 45%
- Searchlight. Rays gather in the second focus of the reflector, passing through the screen, once again focused by the lens. Useful output of light is more than 50%. Advantages of these headlights: better visibility, greater security, better economy, modern style. However, the projector headlights are very expensive.