Yes the ones I have can be dimmed. I don't know if all brand LED's will. Seems like the adjustment range isn't as wide as a regular bulb but yes they dim. I didn't change the 4 warning light bulbs as a side note. Didn't think that was necc and didn't wanna maybe have a fast turn signal.
$51 shipped for all the bulbs. Pricey but I think it was worth it. Again I'm happy with the color. I didn't want it to be too bright white.