Lighting knucklehead Panhead Shovelhead 36-84.  Bulbs. Cowls. Fender Lamp. Headlamp. Lenses. License Plates. Marker Lamp. Reflector. Spotlamp. Tail Lamp. Turn Signal. Knucklehead EL FL 1936-1947 | Panhead EL FL FLH 1948-1965 | Shovelhead FL FLH 1966-1984