As Nichia has announced, the company has gone into a new joint-product development collaboration with Zumtobel, a leading international supplier of holistic lighting solutions, to provide LED lighting with advanced human-centric lighting (HCL) benefits.

The recently launched Zumtobel Spectrum is a lighting solution developed for its luminaires which harness proprietary technologies developed by Nichia – especially those designed within Optisolis™ and Vitasolis™ – to produce a colour spectrum that has daylight properties as reflected by nature instead of mimicking the conventional sky daylight spectra like other high CRI LED solutions available in the market. The unique spectrum has been developed to stimulate human’s productivity and comfort.


Research reveals the relationship between light and human behaviour. Humans not only recognize brightness and colour of light, but human circadian rhythm can be affected by specific wavelengths of light, especially the cyan region. For example, lighting can have an influence on activity levels throughout the day, including waking up in the morning, being active throughout the day, and encouraging sleep at night. While Vitasolis™ provides a very natural white colour, part of its spectrum contains a larger amount of energy in the cyan region, between the wavelengths of 470nm and 520nm which helps control the human circadian rhythm.