1. fresnel- its a lens that helps spread the light evenly and to throw farther. generally, the light is focusable by pulling or pushing the reflector. essentially, this is a projection lighting.
2. PAR light is just a normal lamp w/ fixed reflector. your car headlight is PAR light. This is a non-projection lighting.
projection lighting means simply a system w/ a reflector>bulb>a lens(fresnel or plano convex). modern automobile also have projection lighting but non-focusable. i am pretty sure you have seen both types to relate it to filming lighting. same idea, same concept.
