Thanks to similar fact more and more enterprises, which offer various goods in the field of lightning intensify their efforts so that their products would use significantly less energy than in the past. Hence, the expenses of their exploitation are in most cases believed to be significantly decreased, which is also connected with the fact that they are nowadays significantly more durable. Another reason why this field of industry has considerably developed throughout recent years is connected with the fact that the demand on similar commodities is constantly increasing. It is indicated by the fact that not only new buildings are grounded, but also they are required in cities in the night in order to improve the safety of the citizens and for example 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 various car accidents. However, raise of the light bulbs in a city is referred to bigger expenses rate, which proves that it is important to find a correct balance in the field of lightning concerning people, who are responsible for government of every city. Due to such an attitude they are likely to better care about the structure of a budget.