M&H MATSUSHIMA : 6V incandescent head bulb for H4 lamp [GP2601]
Amazon.com: Ruiandsion H4 LED Motorcycle Headlight Bulb AC 6V Super Bright 2835 54SMD Chipsets LED Bulb with Projector Lens for Motorbike Headlamp, Non-polarity : Automotive
Light bulb 6V H4 60/55W
Amazon.com: DC 6V Negative-ground System 56 SMD H4 LED Lamp Motorcycle Headlight Bulb Motorbike 10W 800LM 6000K White High/Low Conversion Kit : Automotive
NLA63120191 6V 60/55 P45T H4 Bulb for 356 64463120191
5-3/4" Motorcycle 6V Headlight Halogen H4 Super White Light Bulb 6-Volt 25/25W