Attention Guidance, Perceived Brightness and Energy Demand in Retail Lighting

The presentation of merchandise often happens undifferentiated with a high level of brightness causing high energy demand. For human perception this results in intense light pressure and risk of increased glare. We developed and investigated lighting concepts with various lighting distributions and colour contrasts which were investigated in a perception study. 30 participants rated homogeneous, zonal single-coloured and zonal colour-contrasted lighting scenes regarding their brightness impression at two 1:10 scale shop models. Compared to homogeneous reference lighting scenarios, the zonal lighting scenarios can be operated with about 30% reduced overall room illuminance values while being perceived as similar bright.