With the rapid population ageing in Europe and in Denmark, there is an increasing interest in technologies and designs that can support the elderly citizens in sustaining well-being and health along with preventing functional decline . To date, the designs of lighting systems in elderly housing are simple and primarily made to support only visual acuity without taking into account other parameters . But elderly people have higher demands on quality of light as their body has to cope with immobility, pathologies and age-related functional decline .
In this context, this paper investigates the development of a personalised and adaptive intelligent system  to adjust the lighting design in order to improve well-being and comfort levels, as well as to meet the needs of elderly people at home. To this goal, circadian adjusted LED-based (CaLED) lighting is used, which can reflect the rhythm of out-door daylight. CaLED lighting seems that may positively influence age-related needs, mood, cognition, alertness, sleep and improve well-being in general .
To build this intelligent system 3 different types of data are considered and cross-checked: a) medical (biofactors), b) sensor-based (activity detection, actigraphy, etc.) and c) anthropological (mood and behaviour). This way, the effect of circadian lighting on well-being, can be also documented, before this new technology can be recommended for implementation in elderly housing. A test installation is planned at “Sundhedshuset” in Albertslund, Denmark: 15 flats with frail elderly and 9 flats with people with dementia are used.
 Lynch, J., & Draper, H. (2014). Ageing well with technology. University of Birmingham
 Schlangen L, Lang D, Novotny P, Plischke H, Smolders K, Beersma D, et al. (2014). Lightning for well-being in education, work places, nursing homes, domestic applications, and smart cities. Accelerate SSL - Innovation for Europe. SSL-Erate. Available from: http://lightingforpeople.eu/2016/wp-content/uploads/2016/03/SSLerate-3.2-3.4-v4.pdf.
 Mobily PR, Skemp Kelley LS. (1991). Iatrogenesis in the elderly. Factors of immobility. J Gerontol Nurs. Sep;17(9):5–11.
 Gate 21, Abertslund Kommune, Amager-Hvidovre Hospital, Zumtobel, AAU Copenhagen. (2015) LighTel project. Available from http://www.gate21.dk/project/lightel/
 Turner PL, Van Someren EJW, Mainster MA. (2010). The role of environmental light in sleep and health: effects of ocular aging and cataract surgery. Sleep Med Rev. Aug;14(4):269–80.
 Kuijsters, A., Redi, J., de Ruyter, B., & Heynderickx, I. (2015). Lighting to make you feel better: Improving the mood of elderly people with affective ambiences. PloS one, 10(7), e0132732.