The best ceiling at this price I found. One of the plant must facile.Il drilled 2 holes in the ceiling to fix a barrette in which the dome light will fit. Either one breaks through the plasterboard ceiling (dowels and screws are founis) or is screwed into the housing applies plastic DCL. Installation is solid. It only allow 10 cm cable 3x 1.5 mm² to connect the sugar ceiling to the page not supplied DCL. There are 3 GU10 halogen bulbs in 50 watts provided but I installed LEDs, which consume 2.5 watts and the results are impeccable. I am satisfied telllement I ordered a 2nd blank for other room.