The goal of the work is to design and to implement the project of modernisation of the showcase lighting system in Treasury of the Tretyakov Gallery. Geometry and arrangement of the showcases as well as locations of the exhibits allow symmetrical and asymmetrical accent-lighting spotlights using both for illumination of vertical and horizontal surfaces of the showcases and for accent lighting of the exhibits by narrow and ultra-narrow beams. Accent lighting allows us to arrange a hierarchical luminous environment with maximum luminance level on the surfaces of the exhibits and uniform and controlled floodlighting of the vertical surfaces of showcase walls with lesser luminance. The luminaires installed under cover of the upper longitudinal slat near the ceiling, which makes the emitting surfaces of the luminaires completely invisible for visitors. As a result of application of the set of spotlights, a controlled lighting system is established, which creates a controlled luminous environment allowing to adjust particular uniformly distributed luminance on vertical and horizontal surfaces of showcases, as well as on the surfaces of selected exhibits. The luminaires are mounted in perforated racks, which allow us to move, to replace, and to change the number of luminaires.

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• showcase lighting
• exhibit lighting
• museum lighting
• visual comfort
• lighting of vertical surfaces
• glare
• glare reduction
• glare by reflection
• illuminance uniformity
• luminous environment
• lighting control
• luminaire mounting
• perforated racks
• ultra-narrow beams
• wall washers