I recently replaced my stock halogen reverse lights with some Cree style LED bulbs, for increased visibility and light output. Here's a write up on how to do it, with before and after pictures.
Step 1: Remove the taillight assembly (do one at a time) and take out the reverse light bulb.
Step 2: Take your new bulb.
Step 3: Push the new bulb into the socket as best you can. It is not an exact fit, so it will not click in like the stock bulb.
Step 4: With electrical tape, secure the new bulb into the socket as best you can so it won't fall out when driving. Cut around the parts that snap into place so it can still fit.
Step 5: Make sure the bulb is very secure. Push the socket into place on the taillight assembly (it should take some force).
Step 6: Re-install tail light assembly to car.
Step 7: Repeat from step 1 for other side.
Step 8: Make sure both bulbs are working correctly and enjoy your new reverse lights!
Here are some comparison photos:
Stock Lights
LED Lights
Stock
LED
Stock
LED
Stock
LED
If you are interested here is where I got mine, they are only $13: eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
As you can see they are very white, and are quite brighter.
Here is a night pic as well:
Note they are not as blue as in this picture^
This is a very easy upgrade for both safety and style.