PURPOSE: To facilitate the mounting work on a ceiling in a few man-hours.

CONSTITUTION: An assembled body (m) formed of an equipment body 4 and a reflecting plate 6 is brought up to a ceiling and the equipment body 4 is screwed to an embedded rosette 2 while looking at the center part of the equipment body 4 through the opening part 9 of the reflecting plate 6. The catching claws 21 of an all-night bulb cover 7 are inserted to notches 22 formed in two positions of the opening part 9 of the reflecting plate 6, the all-night bulb cover 7 is horizontally rotated to engagingly lock the catching claws 21 onto the opening part 9, whereby the all-night bulb cover 7 is mounted on the reflecting plate 6. Finally, a fluorescent lamp 8 is installed to corresponding sockets 35, and the mounting of a lighting equipment onto the ceiling is completed. Since the all-night bulb cover 7 blocks the opening part 9 of the reflecting plate 6 and shields the central ceiling mounting part of the equipment body 4, a good appearance from below of the lighting equipment 10 is provided.