FAQ about car light


Motorists often have many questions about road lighting. In this regard, the OSRAM Technical Service decided to start a series of articles with answers to the most common questions. In addition, the journal readers will be easier to navigate in the key aspects of the automotive light.


Any car parts must meet strict quality standards, since the safety of the road will depend on the quality of products in the car. Naturally, these requirements for quality and correspondence are distributed to the sources of light, since safety on the road directly depends on the level of brightness and characteristics of the distribution of the light flux.

Bad light distribution or low lighting lights of light instruments significantly increases the risk of an accident, so any car lamp must meet strict standards of quality and light characteristics that have been developed by the European Economic Commission (ECE). This commission was established in 1947, and at the current commission, the Commission includes 56 states, including Russia, which is its participant since 1947.

Each type of automotive lamp must have a strictly defined characteristic set, for example, such as power, light stream, geometric lamp parameters, etc. For example, a 12-voltage high-voltage car lamp has a rated power of 55 watts, a luminous flux of 1500 lm and strictly specified The position of the tungsten filament of the glow relative to the base of the lamp. A 12-volt type H8 type lamp has a rated power of 35 watts, the light stream is 800 lm and also strictly defined the location of the filament relative to the base of the lamp. It is one of the above lamp parameters above not to match these values, and the lamp automatically will not respond to ECE standards and, accordingly, will not be approved for use on public roads.


Any automotive light source must have proper light distribution on the road, according to ECE. This requirement is very important, since the comfort and safety of both the driver and other road users directly depends on the proper light distribution.

Below are examples of the distribution of light on the road:

As can be seen from the drawings, any car lamp should have the right light limit: the maximum amount of light is below the black and white border to provide high-quality lighting of the roadbed, and the lack of light above the black and white boundary in order not to make counter transport in the near light mode.

The black and white border has a horizontal line on the oncoming movement and then, at an angle of 15 degrees, goes up to highlight the side of the road to better visibility of road signs and pedestrians. It is possible to achieve the correct light distribution on the road only if high accuracy is complied with the production of the lamp and the use of high-quality materials, which cannot be said about poor-quality lamps that are collected on low quality standards and thereby do not provide the necessary and safe road lighting.

You will be surprised, but poor-quality and unsafe lamps can often be found in stores among the cheap «No name» brands, and often among the brands that are on rumor in consumers. In more detail, why it is worth choosing high-quality lamps instead of cheap, we will tell in the following articles.