What is Psycho. Lighting Design

Psychological Lighting Design (PLD) is to enhance/improve people's psychological feelings (e.g., working efficiency, purchasing behavior, comfort, etc) and the people's behaviors by lighting design. There are two major backgrounds: one, the progression of the modern lighting technology allows very precise control of the illuminance level and spectral power distribution (SPD) of illuminants; second, the people's behavior under certain conditions is so important nowadays because the world changes too fast and every second counts.

Theoretically, the fundamental of the PLD is the colours. Thanks to the improvements of modern print and display industries, our world become more colourful than before. The colours would certain dominate the people's daily life. Moreover, the colour actually is the reflection of the material surfaces; hence, the lighting plays an important role.

To achieve the PLD, the correlation of the lighting, colours and the psychological assessment must be built. Dr. Yuan have analyzed more than 400 psychological assessment data against 116 different illumiants from 8 recent research reports (2014-2015), and then he developed the tool of Psychological Assessment Correlation (PAC) model and it evolved into Preferred Colour Probe (PCP). By PAC/PCP, we know how much people like/dislike a certain colour, because of certain artificial lighting.

Once the correlation model can be obtained as the baseline, we could manipulate the SPD and illuminance level to quantitative predict the people's behavior. An example is available here to illustrate how Psycho. Lighting Design in Fashion Shop lighting design.