Abstract: A lighting system having at least one light source for supplying artificial light and a control unit for controlling the light source. The light source is of the type having an adjustable color temperature. The control unit is provided with a control signal form a signal from a signal generator. The signal generator is dependent on the mean daylight level. The control unit is arranged to adjust the color temperature of the light source in dependence on a predetermined relationship between the mean daylight level and the color temperature of the artificial light. The lighting system will provide artificial light which will when the daylight level, as measured on an office desk, increases from approximately 400 lux to approximately 800 lux, increase the color temperature from approximately 3300 K to approximately 4300 K.

Abstract: A lighting system having at least one light source for supplying artificial light and a control unit for controlling the light source. The light source is of the type having an adjustable color temperature. The control unit is provided with a control signal from a signal generator. The signal generator is dependent on the mean daylight level. The control unit is arranged to adjust the color temperature of the light source in dependence on a predetermined relationship between the mean daylight level and the color temperature of the artificial light. The lighting system will provide artificial light which will when the daylight level, as measured on an office desk, increases from approximately 400 lux to approximately 800 lux, increase the color temperature from approximately 3300 K to approximately 4300 K.

Abstract: An artificial lighting system comprises a daylight sensor for sensing a level of daylight, artificial light source means for providing a level of artificial light, daylight control means for control of the level of daylight and a controller for control of the level of artificial light dependent on the sensed level of daylight. The controller decreases the level of artificial light with increasing level of daylight when the sensed daylight level is below a threshold, and reduces the amount of daylight through control of the daylight control means when the sensed daylight level is above the threshold.

Abstract: A mounting member for a line illumination comprises single ended compact fluorescent lamp and a plurality of double ended tubular fluorescent lamps arranged in line and mounted in pairs and with its cap located. The mounting member is a T-shaped, light transmitting body, in which respective parts of two pairs of lamp holders are mounted, back to back, remote from each other, so as to allow the compact fluorescent lamp to be accommodated there between.

Abstract: A device for line illumination comprises a carrier and a plurality of double ended tubular fluorescent lamps arranged in line and mounted in pairs of lamp holders. Between each two lamps a capped, single ended compact fluorescent lamp is present and with its cap proximate the carrier. The device may also comprise a screen having a side facing the carrier. The tubular and the compact fluorescent lamps are then located at the side facing the carrier. A T-shaped, light transmitting mounting member is provided in which respective parts of two pairs of lamp holders are mounted, back to back, remote from each other, so as to allow a compact fluorescent lamp to be accommodated therebetween. The device provides a light line of homogeneous brightness giving an even illumination.