Instrument / indicator / reverse / side light lamp 6v offset 120 degrees pin bayonet LED, negative earth (-ve), pair, BaY9s base (single filament) T11 bayonet 5 LED, white. white 6000K approx 100LM, 1W. . Bulb has Bay9s mcc base (aka Type 51).max width 12mm, max height 30mm, base 9mm