Taking into account that there is a demand to increase the efficiency of indoor lighting power consumption, an effective light design must be developed that can be applied as well as in old buildings as in new projects. In order to achieve lower total building energy consumption without sacrificing lighting quality, there is a need for effective lighting modeling, which gives reliable, in real life prospective results. These models in combination with energy-efficient lighting fixtures, as well as the integration of daylight reduce energy consumption and maintenance costs of the premises. This paper evaluates the possibility to measure luminance of light sources and detect sources of glare, using ordinary digital single-lens reflex camera (DSLR) and image editing software. Methodology and workflow is presented. The results then are discussed and ways to improve the accuracy of the measurements are highlighted.