Joe,
You want a (H-4 type, 12 volt60/55watt). This will come by many bulb manufacturers.
Stock Honda part#-34901-mc7-601ah
I bought a Sylvania SilverStar H-4, still a 60/55 watt bulb, but it's 35% brighter, 30% more down the road, 35% wider beam of light. Supposed to be "whiter and brighter"
I like it, my riding buds notice a differance too. Available in local parts stores. It is not any hotter, therefore safe on your plastics
Part # H4ST