Visual comfort of office workers using daylight and artificial light

In today's working environments artificial light becomes more and more dominant for the working situation. That is why two different setups of offices were created concerning the lighting of office work places, which were equipped with modern light devices. One was provided with a direct/indirect lighting system, adapting automatically to the outside lighting situation. The other office was equipped with a light ceiling, where every light could be switched on or off by the subjects using the room. Over a period of two years the lighting situation being adjusted by the subjects was measured three times a day. The outcome of the measurements is shown, coming to the result that today's standards concerning lighting may be too high, thus giving room for an energy saving lighting layout.