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 Comes With 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.