H1, H4 And H7 Are Also Available As “+50” Or “+80”. These Bulbs Are Advanced Developments Of Conventional Bulbs With Thinner Filament And Inert Gas Filling. Due To This, They Can Be Operated At Higher Temperatures And Reach A Higher Luminance, Up To 50% Or 80% More Between 50 And 100 Meters In Front Of The Vehicle. The Range Of Illumination Can Also Be Increased By Up To 40 Meters.