Ceiling-installed lamp has housing in region of housing back wall enclosed by annular lighting device with mounting for accommodating ballast

摘要

A ceiling-installed lamp has an annular lighting device (15) located in a lamp housing (2) and one or more ballasts (7) to operate the light. The lamp housing (2) in the region of the housing back wall (5), enclosed by the annular light, has an apparatus mounting (6) for accommodating the ballast, recessed from its outside to the inner chamber of the lamp housing. . This recess appears as a body (12) surrounded by the annular lighting device corresponding in its shape largely to the shape of the lighting device, projecting into the lamp inner chamber. Its surface pointing to the lamp inner chamber is part of the photometrically effective reflection surface