New Lucas Type Halogen 12 Volt 60/55 Watt Headlamp Bulb. It’s Finally here! We have been waiting Decades for a Halogen Bulb to replace the Old Lucas “Pre-Focus” types! If you need a Brighter and Stronger Light Bulb but do not want to settle with a “Sealed Beam”, then this is exactly for you! The base of this bulb is exactly the same as the original Lucas BPF types, which means, you can simply plug this into your original Lucas Headlight and be done with it! “Plug N’ Play”! No modifications or extra parts necessary! Base measures 22mm and the flange measures 36mm. Fits a wide range of 12 volt British motorcycles from Triumph, BSA, Norton, AJS & Matchless both Twins & Singles equipped with the Lucas Pre-Focus Light Unit! Please refer to your parts catalog for proper fitment.*****Please make sure that your Charging / Electrical system will be capable of handling the wattage of this Bulb!***** Made by EMGOO.E.M Part number is 446H, 370H or 414H