All roadway lamps must be designed according to specific standards. The most popular standards are a US standard called IESNA RP 8-00 Roadway lightning and a European standard called CIE 140-2000 Road lighting calculations. In the case of CIE 140-2000, the standard defines only parameters definitions, calculations and measuring technique, the actual parameters values usually regulated by national standards. Some countries like Russia or Brazil use their own standards. RP 8-00 defines 5 types of streetlight pattern, each with three variations short, medium or long. Type V has a symmetrical intensity distribution. Type VS is similar to Type V but has a more square shape. Type III Medium is asymmetrical and is the most popular and is used for general roads, for wide road and city streets. Type II is similar to Type III but it usually used for small roads and walkways. Type I is easier than Type II or Type III, because the lampis placed at the center of road. Type IV is more complex than Type II or Type III. It require an asymmetrical pattern but wider across the street. It can be used for wide roads.