Due to this kind fact more and more enterprises, which provide miscellaneous goods in the field of lightning step up their efforts so that their products would use significantly less energy than in the past. Therefore, the expenses of their exploitation are generally considered to be considerably reduced, which is also related to the fact that they are at present much more durable. Another reason why above mentioned area of industry has substantially developed during recent years is referred to the fact that the demand on this kind commodities is constantly increasing. It is implied by the fact that not only new buildings are established, 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. On the other side, increase of the light bulbs in a city is related to bigger expenses rate, which implies that it is necessary to find a correct balance in the area of lightning regards people, who are responsible for government of every city. Owing to such an attitude they are likely to better care about the structure of a budget.