57 light bulbs?
There are basically 3 types of headlites you could use: sealed beam (all one piece), halogen (housing and separate bulb designated by an "H"#). High voltage Zenon projector (the ultra bright bluewhite headlights you see on higher end new cars).
Sealed beams come in std incandescent and "halogen" (not to be confused with the separate bulb halogen). These are direct replacement for the OEM and therefore are the easiest and least expensive ($3-10.00 ea) to use, but give the lowest light output. Don't even bother with the std incandescent, unless you are a purist restorer, the light output isn't adequite for today's highway speeds. Use at least the higher output "haogen" bulbs. If your wiring, plugs and grounds are good no changes are necessary with these bulbs.
The H style replacement bulb halogens are what is used in most of the cars on the road today, since the gov allowed their use in the late 80s for safety and so the auto manufacturers could shape the headlights to flow into the body shape to reduce wind resistance. These are small bulbs that are low beam only, high beam only or combo hi-lo beam. To use these in an older vehicle that used sealed beams some updating is needed: first you must replace the sealed beam bulb with an adapter housing. The adapter housings come in various materials and prices as well as with different "custom features" but all perform the same basic function as a holder/protector for the bulb and reflector for the light. The glass lens/metal reflector is heat proof and likely to be the longest lasting. You will also need to upgrade the wiring since these bulbs require more current than most switches can handle for long heavier wires from the battery thru a relay are necessary. Side note: there are a lot of high priced bulbs out there designed to make the uninformed part with their money.
DON'T fall for the hype! The gov sets the max legal wattage, and all the same wattage blubs put out the same amount of useful light. Changing the color of the bulb or the packaging the bulbs are sold in doesn't change the physics, buy the cheapest bulbs of that wattage ~5-6.00 ea (probably need to go to a regular parts store and ask for them by H#, the ones on display or at an accessory store or even Wally-world will be the fancy package high profit ones)! There are higher wattage bulbs out there that put out more light, but will be listed as for off road use only since they are technicallt illegal, and require heavier wire, relay and sockets that can handle the current and the heat generated can melt plastic lenses and housing adapters!
The zenon projector bulbs are the brightest, but are the most expensive (several hundred for the kit) since they require very heat resistant adapters and step up transformers to supply the voltage and current required for these bulbs.





