I never got back with my experience with a sealed-beam LED headlamp. The light was very bright, current draw low, but... it failed after a few weeks of use. Disassembly revealed that a small component had broken off the circuit board. My boss thinks it can be fixed, but it's been on the back burner for a year. In the meantime, I re-installed my automotive sealed-beam incandescent headlamp.
From everything I've heard, the LED BULB sounds like a better idea, but you have to have a lens and a reflector, which I did not have. And I believe CBS supplies bulbs for positive or negative ground systems.
FWIW, my main motivation for "going LED" was to alleviate a charging problem I was having. In the meantime, I replaced my alternator rotor and stator, and now the charging is up to snuff, even with the conventional headlamp.