What is light?
Light is what in the world of physics be called an electromagnetic movement, a form of radiation. Light in itself is not visible. The beam of light detected by the human eye in a spectrum of electromagnetic radiation is what we call “visible light”. Light is usually divided into two subgroups: natural daylight (the sun) and electric light. Much of the light we have indoors is daylight, but it is many cases not enough which is why we add electrical light.
Light is speedy. Light travels at about 300,000,00 m/s, which is almost 9 million times faster than the cheetah, the fastest land animal!
What is light in a room?
How to describe something that can’t be seen or touched? Lighting experts usually describe indoor lighting with reference to 7 different factors, for example to colour, shadows and light level.
7 factors describing light
How does light affect us?
Light has great influence on human health and well-being. Incorrect lighting can contribute to tiredness, tension in the neck and back as well as disruption to the circadian rhythm, sleep-wake rythm. Flicker from lighting sources can cause nervous system stress reactions and an inaccurate light picture might cause discomfort.
Learn more about how light affects us
Light and energy savings
Today, iti is possible to use sustainable and energy-efficient brightness-controlled lighting systems. Lighting fixtures with built-in sensors to detect movement in a room brighten automatically in response to occupancy and dim when rooms are vacated. By means of a daylight control feature, the level of the light can be adjusted and dimmed when natural daylight is making it brighter inside. This saves energy. Light placement is the matter of having the right light in the right place at the right time, comfortable and sustainable.