Russian National Public Library for Science and Technology has the status of a scientific research institution. The Library has a Scientific Board consisting of well-known scientists and specialists in the sphere of library and information sciences. The building is designed for 770,000 books and the total area with the parking lot makes up 13,780 sq m. Lighting Technologies made a delivery for all types of premises. The LED luminaires installed will allow a more than RUB1.5 million maintenance cost reduction yearly and more than RUB5 million’s worth of electricity connection savings (one-time). Even taking into account that the price of LED luminaires is 2 million higher, saving will make up 3.5 million in the first year alone. Thus, application of LED is paid back in the first year.