The combination of the energizing azure (sky blue) and a peaceful, calming warm white hue

Recently, the influence of natural light on the human body and its influence has been drawing attention, and its importance has been reaffirmed. It is believed that the insomnia and other physical disorders that a large number of people suffer from today can be attributed to modern lifestyles that make it difficult to get enough natural light. The building industry is increasingly encouraging designs that bring more natural light indoors. In the field of lighting, another major challenge is how to realize light and lighting environments that are comfortable for humans and therefore, so-called human centric lighting and circadian lighting have been gaining attention. There is a movement to require designs for indoor lighting with a new concept that focuses on the “quality of light” and the “function of light”.

What has been lacking in conventional indoor lighting is 480nm light, which is abundant in the morning sun. This 480nm light stimulates the secretion of serotonin, the “happy hormone,” and activates the human body and mind. The more serotonin secreted in the morning, the more melatonin, a sleep hormone, is secreted 14 to 16 hours later, using it as a source. Thus, 480nm light is considered as very important by having a twofold significance.
Focusing on this 480nm light, Nichia proposes Azure color LEDs that can effectively supply the light of that wavelength, and Dynasolis™, a color and spectrum tuning solution that is achieved by using Azure color LEDs.

Conventional color tuning lighting has used mainly 6500K LEDs on the high CCT side and 2700K LEDs on the low CCT side. Dynasolis™, which has the high CCT side replaced with Azure LEDs, can maximize the melanopic illuminance by increasing the output at 480nm, thereby stimulating physical and mental activation from awakening in the morning and melatonin secretion in the evening and beyond. Furthermore, by gradually reducing Azure-colored light and changing to the lower CCT, it is possible to produce light that gives a sense of comfort. Nichia approaches the adjustment of circadian rhythms from the perspective of spectrum tuning.