GU5.3 12v 50 Watt max lampholder. MR16 12v 50 Watt lamp (not supplied with fitting - products codes L50D, L58D or L59D). Electrical termination via 10 Amp connector block within secure enclosue c/w cord grip and bridge. Dimmable with electronic transformer (not supplied with fitting - see Transformer & Drivers section). Outer diameter 82mm, recessed depth 100mm. Cut-out 60mm. 130mm recommended ceiling void required. Spring clip fixings with a recommended maximum ceiling thickness of 15mm.