Lighting device has container, in which electronic circuit is accommodated, where film layer is formed on external surface of container, which contains material with high thermal emissivity

摘要

The lighting device (20) has a container (21), in which an electronic circuit is accommodated. A film layer (22) is formed on an external surface of the container, which contains a material with high thermal emissivity. The information-displaying area (23) is arranged in an information-transmitting pattern by simultaneously placing a material with high thermal emissivity of a different color compared to other areas. An independent claim is also included for a lighting fixture with a casing.