Preference of Residential Interior Lighting

ANDRÉS MARTÍN; JESÚS OBANDO; CARLOS KIRSCHBAUM

Boston

Conferencia; IES Annual Conference, Light Balance; 2018

Illuminating Engineering Society

With the aim of investigating the choices preferred by users in front of the different alternatives that can be found in the field of interior residential lighting, a living room was designed in real scale in which it is possible change both sources and levels of lighting. Twenty-four lighting conditions were evaluated, including the combination of four different technologies: Incandescent (I), Halogen Incandescent (HI), Compact Fluorescent (CF) and light-emitting diode (LED), with three different levels of horizontal illuminance between 215 and 630 lux and classified as cold (6500K) and warm (2700K) color temperatures. All the lamps evaluated belongs to the base group E27, which are the most used in residential homes.Twenty-four observers completed subjective evaluations through a questionnaire of semantic differentials in which categories related to perception of the enlightened environment were evaluated.Results showed, for all evaluated conditions, that maximum levels of illumination are qualified with highest values. At the same time, significant variations are observed in the assessment carried out for the different lamps and color temperatures. It is distinguished observers? preference for warm lighting (2700K) and lamps such as HI and LED. Also, lamps that are preferred distributes the light more uniformly throughout the space. These results might be interesting for both designers and users since they could be used as recommendations when an environment to be illuminated is going to be designed, considering technological, economic, structural aspects and also people?s perspective.