Searched first and found some similar posts but this is just informational for people that may use "2013" in their search string Mods please delete or move if needed.
I installed the new CREE "style" LED bulbs in my reverse lights. There are a lot of people selling them on ebay so just find a seller you like and go crazy. I chose to search for T10 CREE LED and found what I wanted. Specific ones I bought: 2pcs T10 Wedge CREE R5 Emitter 7W Super Bright LED Reverse Back Up Lights | eBay - Arrived a day after I ordered!. I chose to go with a 7 watt LED to make sure I didn't have any heat problems. I also was cautious about the bulb size as I had read others being careless about what they ordered and having them not fit in the housing. What I got is advertised as T10 which is a wedge based bulb. It has many other names, some correct and some not, such as 168/194/T15/T20/etc. Be careful with what you order.
Install is VERY SIMPLE. Remove trunk insulator, half turn to remove housing, slide out old, slide in new, test, done.
I will post some other pictures later with the car backed up against a wall at night or something, but others have posted their results and they aren't lying, these are REALLY FREAKING BRIGHT.
Stock vs LED (7 watt CREE LED - 23mm in length - With how small the LED is you could stand to go with a slightly larger diameter and length if you so choose:
Stock vs LED (Don't be an idiot, your stock bulb gets SUPER FREAKING HOT so don't touch it right after you take a picture of it, ask me how I know):