Creating the required distribution of the cylindrical modelling index in general interior lighting
Paulina Komorzycka
supervisor: Piotr Pracki
Indoor general lighting should be neither overly directional nor overly diffused. Ensuring a balance in the directivity of lighting in the interior reduces the undesirable effects of too sharp shadows and monotony in the illuminated space. One of the measures used to assess the effect of directionality of lighting in rooms is the modeling index (MCY), defined as the ratio of the values of cylindrical and horizontal illuminance at a point on the reference plane. The paper demonstrates that the achievement of the required MCY index in general interior lighting is significantly limited. According to the simulation results, the influence of the room size (RI), reflection coefficients (RO), the class of the luminaire (CL), downward luminous intensity distribution (LID) and the arrangement of the luminaires (SH) on the value of the MCY index was determined.
Fig. 1 Distribution of minimum and maximum values of modelling index for h = 1.2 m conditioned by SH and grouped by RO.
Useful types of luminaires and their layout have also been identified in terms of achieving the desired modelling effect in general interior lighting. Multiple linear regression models for MCY indicators were developed, taking into account the parameters of the room RI, RO, and the luminaires and their arrangement CL, LD, SH. The possibilities of using the obtained results in the practice of designing general interior lighting were presented. The limitations and directions of continuing the research were indicated.