1 Light Size: Height 23cm Diam 25cm Wattage: 1 x 40w mains halogen Socket: G9 capsule 12 Light Size: Height 46cm Diam 46cm Wattage: 12 x 40w Socket: SES/E14 Small Edison Screw 18 Light Size: Height 63cm Diam 69cm Wattage: 18 x 40w Socket: SES/E14 Small Edison Screw