Summary: This article considers the problem of natural light and insolation conditions degradation in conditions of residential areas renovation. This article provides an analysis of this degradation and considerers possible methods to increase these parameters

Key words: sun exposure, lighting, reconstruction, light well.

Summary. In article, on the basis of the analysis of the existing light sources used in industrial, civil and in household rooms, characteristics of modern luminescent lamps of low pressure with electronic input-regulate devices are investigated.

Key words: light, illumination, fluorescent lamps, man, ultrasound.

Summary: The article made an analysis of existing measures to improve working conditions in the workplace of noisy enterprises and adjacent territories. Analysis of the accepted classification of noise protection measures applied to reduce the noise in the workplace and for the areas adjacent to noise sources, enabled the authors to complement and enhance each of them. Given the magnitude of the possible acoustic efficiency of each of the above events.

Keywords: noise, workplace, enterprise, acoustic efficiency.