Does anyone know if 921 and 912 (and T15) lights the same? these are the back-up lights to the '03 tacoma. I am looking to upgrade to brighter ones, probably LED's. I found a site somewhere that these lights were all the same, so I want to make sure I get the right ones since the p/n lookup at Autozone said my truck takes 921's.

Also, anyone have experience with LED's or super-bright backup bulbs? With my tinted windows, i would like some more reverse lighting.