IMHO there is no excuse for any car, especially a Toyota (which I have 3) to allow you to leave a light on for extended periods and drain the battery. The same issue exists on my Sienna. I have the habit now of double checking the dark garage at night to see if the kids left a reading light on. It is so simple for the microprocessor to figure out that the car is powered down for x period of time so it should shut the lights off. I wonder if this is something that can be reprogrammed by the dealer? I'll ask next time I'm there.