The therapeutic light in the chancel is a combination of a sun simulation and bright light simulation. The sun simulation, or daylight simulation, means a sunlight period from sunrise to sunset every day in the chancel. In order to get the stimulating effect on the circadian rhythm the sunrise/sunset simulation is combined with therapeutic bright light. A period starts with a sunrise simulation at 250 lux and a CCT of 2 000 K, helping people to wake up their body and mind, and during the morning time it switches to the bright light in a transition – the intensity level increasing continuously, until it reaches 10 000 lux and a CCT of 5 900 K. Then in the evening, the simulation is turning back, and the period ends with a sunset simulation, supporting the relaxation, and prepare the body to sleep. During the daytime, the bright and cooler light has a good effect on the energy level and decrease the symptoms of winter depression, by giving the body the appropriate amount of daylight.