Why do we do sport? Why do we consider what we eat? Why have our parents done doctor’s checking for us when we were kids?  One answer is to keep our healthiness. Healthiness is a main key in my master degree project. In this project I have explored such daily life behaviors that influence on our physical healthiness. I have looked into the ‘health’ as a main topic and ‘quality of life’ as a sub-topic from three perspectives: medical science, life-style studies, and industrial design. I have collected information from specialists, designers, and target users by use of surveys and interviews besides of literature studies. I have applied the outcomes of the research in designing a lamp in order to adjust the sleeping and awakening time. The health-oriented function of the lamp is based on the colors of light which it provides. In Nordic country there is a special situation in terms of day-light. It is different in north and south parts. But in general in half of the year specifically in few month most of hours of 24 hours are dark and it’s opposite in another half of a year. This situation effects on a human-body biological clock and disturbs times of sleeping and awakening. To re-adjust right timing I have suggested using a lamp which provides a variation of lights from bluish cold to reddish warm.