Patent ID: 7744253

Claim:
A built-in lamp comprising a holder for fastening in an installation surface ( 11 ), a bulb ( 6 ) and a direct light reflector, with a reflector opening disposed in the direction of illumination defining a generally planar direct light discharge region ( 1 ), which is surrounded by a generally coplanar diffuse light discharge region ( 2 ) such that scattered light is discharged from the diffuse light discharge region ( 2 ) around the direct light discharge region ( 1 ), characterized in that the bulb ( 6 ) and the direct light reflector ( 4 ) are arranged in a housing ( 10 ), said housing having a planar inner surface which overlies the reflector and which forms an additional reflector ( 7 ) which reflects at least a portion of light from said bulb to said diffuse light discharge region; and in that the housing ( 10 ) is terminated in at least a largely dust-proof manner by a transparent planar plate extending across and covering said direct light discharge region and a planar scattering plate extending across and covering said diffuse light discharge region, said transparent planar plate and said planar scattering plate being coplanar with each other, and wherein the direct light discharge region ( 1 ) has a circular shape, and the diffuse light discharge region ( 2 ) is bounded on the inner side by a circular line ( 3 ) and on the outer side by a polygonal line or by a further circular line.