Light & Engineering Vol. 23, No. 1, pp. 71-78, 2015 Svetotekhnika No. 4, 2014, pp. 46-51 ENERGY-EFFECTIVE TECHNOLOGIES FOR HOUSING AND UTILITIES USING A CASE STUDY OF ENERGY SAVING ILLUMINATION IN ENTRANCE HALLS OF APARTMENT BUILDINGS Andrei V. Prokhorenko and Alexei K. Solovyov1 MGSU State budgetary educational institution of higher vocational education National Research University, Moscow E-mail: k.solovev@yandex.ru ABSTRACT A real life case study of energy saving in housing and utilities is presented. 1 The potential of using auto controlled illumination systems for entrance halls of multistory apartment buildings is analysed. <...> This system identifi ed movement in an entrance hall and depends on external illumination. <...> Energy effi ciency of this system, its fi nancial benefi ts and payback period are estimated. <...> An economic evaluation of an autonomous system for entrance hall illumination using photo-electric batteries is given. <...> Keywords: illumination, energy saving, housing and communal services, entrance halls of houses, automatic adjustment of illumination, illumination sensors, movement sensors, autonomous illumination system The environment provides inexhaustible sources of natural energy. <...> Increasing energy effi ciency in buildings depends on a transition to renewable energy sources as a part of the system. <...> In particular, this concerns the illumination of housing and utilities, including entrance halls of multistory apartment buildings of mass fabrication. <...> In this case, sunlight, as a renewable energy source, is transformed into electricity by photo-electric batteries. <...> The work presented in this article is a calculation simulation of annual consumption of the energy necessary to illuminate entrance halls and staircases of apartment buildings comparing different illumination systems. <...> As a case study for this research, a real nine-fl oor fi ve-entrance brick apartment building of the series II-29, is examined. <...> It is located in the Ivanovoskoye area of Moscow, 22–2 Stalevarov street. <...> As part of the research, an evaluation of effi ciency of existing illumination systems was performed and a technical solution to modernise and increase energy effi ciency was proposed2. <...> Layout of a fragment of the staircase of a nine story brick house of П-29 series According to the observed values, the annual operating time of the artifi cial illumination Tyear <...>