The importance of lighting

  • Light has been known for a long time to enable sight, safety and orientation.
  • Light can do more than enabling vision. Light has the power to energize, to relax, to increase alertness and cognitive performance, to impact mood and to improve the sleep-wake cycle of people.
  • Light can do much more than saving energy.
  • The true value of light lies in the combination of excellent visual, biological and emotional benefits.

We need light and darkness
There is a period of the day when we are active and a period when we are sleeping Light is the most important timer for our internal clock

Lighting Systems

Provide dynamic and tunable light (dimming and boosting light intensity and tuning spectrum) enabling Human Centric Lighting.

Lighting systems are measured in actual energy consumed and not in maximum installed power

The 'lighting system design process' will be an important tool to

Define the lighting design according to user needs and investor interest

Achieve transparency, documentation and planning certainty

Ensure energy performance and lighting quality according to design

Lighting systems react instantly to users' needs, thereby reducing energy consumption

Timing, occupancy and daylight sensors

There is a discrepancy between natural and electric light with regard to intensity, color and dynamics of light

Natural light is dynamic from sunrise to sunset

Electric lighting is fixed: from wake-up to go-to-sleep

Light has an effect on




Alertness, cognitive
performance and
sleep/wake cycle


Mood, energize and relaxation

We need the right light for our activities at the right place at the right time




Elderly Home



Metrics exist for visual aspects and new metrics are in development for non-visual aspects

Melanopic equivalent daylight illuminance

Age-related needs for light

Light levels entering the eye