Hello. I've recently moved to a new home which doesn't have ceiling lamps installed yet.Most divisions look like this: http://ift.tt/2FuFbXC is the easiest way I can stick a led ceiling lamp up in the ceiling? drilling nails? cutting holes? using glue?Also, regarding wire color code, I figure that: the yellow/green wire is ground, the red is live and the blue is neutral.There's 3 wires as expected. But in certain divisions, like the living room, there is a fourth wire coming out which is black colored. Any idea for the purpose of that wire? via /r/DIY http://ift.tt/2D0QA3y
