When dragonator wanted a new lamp for the roof, he didn't go and buy one. He made a giant, supremely impressive GlaDOS one. As you do.
Built using a 3D printer, as you can see, it barely qualifies as a "lamp" anymore at all. "Elaborate roof sculpture that happens to also illuminate" might be more fitting.
If you've got access to a 3D printer, dragonator will be sharing the plans for the piece shortly. And even if you don't the schematics and 3D renders still make for awesome wallpaper. Until then, enjoy the pics.
A fully 3D printable GlaDOS Robotic ceiling arm lamp [Instructables, via Geekologie]