To obtain proper visual sharpness and better contrast, people of older age require heightened light levels due to age-related failing vision. Furthermore, inappropriate light at night disrupts not only sleep but also the timing of the circadian rhythm, with negative consequences on cognition and emotions. Therefore CALED is being increasingly considered for use in hospitals and elderly housing because of its wide spectrum of wavelengths, good contrast and fast switching, and possibility to support a normalised circadian rhythm.