I just installed two different superbrightled's on opposite ends of my dash to see what color I wanted. I ordered a 15 SMD wedge base tower in warm white and one in cool white. I have to say the warm white looks identical to the incandescent bulbs in the rest of the dash while the cool white looks more modern for lack of a better term. Yes, they are dimmable and I am pleased with the speed in which I received my order. I also replaced all 4 tail lights with LED's and they are not significantly brighter but they are brighter just the same. I have no idea about the longevity yet but will post when and if they die. To be honest I do not do much after dark driving so I will have to just do periodic checks of my dash lighting. I figured before I spent the money on all LED's for my dash I would give them a beta test, decide on the color, etc. So far I have swapped the dome light, under hood light, tail lights and two dash lights. I am actually very pleased so far and will no doubt order a glove box light and a few more warm white (P/N WLED-WWHP15-TAC) tomorrow.