Just completed this install myself (2012 SX) to install the K5OS 50W Cree LED reverse lamps.
Do test each install before you button it all back up to ensure the lamps light correctly (50% chance of reversing them I think, then they don't light correctly although they are not defective - it's just the way LED lamps work - like a Diode).
Results: I can see a better, brighter image in the OEM backup camera and in tight spaces where the light bounces off the walls better. Worth the $$$ in my opinion and they should last the life of the car (Cree LED quality).
Install DIY:
http://www.optimaforums.com/forum/6...difications/12563-install-reverse-lights.html