I purchased the LED lights from a site I had used before called Zenmarket ,the lights are made by 'Yours' and seem to be extremely well made.I didn't fit the vanity LEDs as our fittings are slightly different.Not quite sure what you mean by dimming
But the lights come on almost instantly.
I had ijdmtoy interior LED's fitted in my 3G Prius for a while earlier. They were just *way* too bright. You opened the doors and it was like being in a hospital operating room. Also the color temperature was very cold. After taking them out, I felt like the standard lighting is actually quite nice and doesn't hurt your eyes when it's dark outside.
Yes I can see what you mean those are some serious LEDs.The CHR kit has nowhere near the amount of LEDs of those in the Prius kit.But I will have to see if I get use to these or not,but for the moment I'm liking them.