for most lamps from the VTLAMPxxx & VTLLAMPxxx series Product basic info Primary colours: White Depth unit: 25 mm Height unit: 75 mm Width unit: 50 mm Weight unit: 254 g Physical properties Height foot: 65 mm Width foot: 51 mm Technical data Mounting type: Wall mount Operational properties Diameter mounting hole (mm): 12 mm (EN)