I had
ordered an LED light array meant to go in your car's trunk instead of the little wimpy incandescent light bulb that came with the car originally. It uses less electricity than the old incandescent and is much much brighter. Pretty cool, actually. Only $4 on Ebay.
Installation was easy. You just take out the old light bulb (quickly before it has a chance to heat up and burn your fingers.)
And then put the appropriately shaped light bulb adapter into the socket. Connect the light array, peel off the adhesive backing and stick it to the underside of the trunk. The light output is pretty impressive.
So bright, and uses less power.
But I was too smart for my own good. Apparently the Camry has a circuit board in the back that checks the resistance of the light bulb circuits, and if they go outside certain parameters, it turns on a warning light in your dashboard that your tail light is out. The resistance is so low on these LEDs that the circuit board thinks there is a problem. I'm getting a warning light on the dashboard.