All the components of a room, that contribute to environmental wellbeing, such as exposure, architecture, furnishings, colors and natural sunlight, are taken into consideration in a holistic approach.
There is not only one kind of light; there are different lights: a light to see, a light to look at, a light to watch.
The barren lux concept is obsolete and should be widened to comfort, taking into account visual perception: the human eye doesn’t perceive the total wattage, but the light distribution.
So, a qualitative rather than quantitative lighting design is requested.
In a working environment reduction in contrasts prevents fatigue.
Most important, through a differentiated light on vertical surfaces rooms look wider and brighter (vertical surfaces account for 80% of the perceived ones).
Also, it’s necessary to pay special attention to other important factors: the colour rendering and constancy, flux and the thermal stability of LED,technology, now most widely used.
Text by arch. Gianni Ronchetti, lighting designer.
The evolution of the office lighting design approach from the 70’s to the 90’s to the present holistic approach.
Left: workplace with traditional lighting design;
Right: restyling of the same workplace by a holistic lighting design.