Thanks to such a fact more and more corporations, which provide various commodities in the field of lightning intensify their efforts so that their goods would use considerably less energy than in the past. Consequently, the expenses of their exploitation are in most cases thought to be considerably decreased, which is also connected with the fact that they are currently far more durable. Another reason why this area of industry has significantly developed during recent years is related to the fact that the demand on this kind products is regularly increasing. It is implied by the fact that not only new buildings are set up, but also they are needed in cities in the night in order to better care about the safety of the citizens and inter alia drivers of the automobiles. The more lights are available in a city, the more we are likely to avoid situations, in which we would participate in different car accidents. Nevertheless, raise of the light bulbs in a city is connected with greater costs rate, which proves that it is required to find an appropriate balance in the field of lightning regards people, who are responsible for government of every city. Thanks to such an attitude they can better care about the structure of a budget.