One of the first things I did when I got The Wretched Roadster was install these, LED taillights, and LED bulbs in the cowl lights. These headlights work perfectly. The light is as bright as a modern unit, and the pattern is well defined so it doesn’t dazzle oncoming drivers. The high beams aim higher than the low beams. The LED circuitry draws so little current that the ammeter barely moves when the lights are switched on. I especially appreciate that it’s a completely self-contained optical system. It does not involve the reflectors, and does not require focusing. After a few weeks one stopped working. I called Snyder’s, returned it, and they shipped me a new one. Works fine.
The LED taillight panels (not replacement bulbs) are excellent. Makes the car so much more visible from the rear. As expected, the turn signal flasher didn’t work because the current draw was so low, so I wired in the recommended resistors. Still didn’t flash until I went back to regular incandescent bulbs in the cowl lights. Now the turn signals work but the speed of the flashing is not steady. After a short initial delay they blink quickly, then pause for a beat, then slowly, then faster again. I imagine an electronic flasher could be programmed to work consistently rather than the standard thermal unit.
Reminds me of the joke about the guy who was asked if the turn signals worked. He said Yes. No. Yes. No.