Visually, biologically and emotionally
In earlier studies, research subjects had only been able to assess their reactions in terms of the visual task (visually) and how they felt (emotionally). But now the hormonal reaction can be measured as well. A study was carried out on the basis of VBE (Visual, Biological, Emotional) to provide more conclusive proof on the significance of ambient light for human well-being.
How much light is best?
The aim was to investigate how people are affected by working in a room with three different levels of ambient light: 20, 100 and 350 cd/m2. Just like in the previous study, the room lacked incidental daylight and the light levels on the calculation plane, i.e. the work desk, were kept constant at 500 lux. The participants’ visual, biological and emotional reactions were studied during the test. The participants’ hormone levels (cortisol and melatonin) were also measured at regular intervals throughout the day.
Ambient light is very important
The study showed that ambient light is very important for the visual task (visually), alertness (biological) and the experience of light in a room (emotionally). The most positive reactions were registered at an ambient light level of 100 cd/m2. The study also determined that the colour temperature of the light was not significant in terms of how the research subject felt or performed.