Sounds like your alternator. You can have both your alternator and your battery checked, usualy for free at any auto parts store like Advanced or Zone.
A couple reasons. one is that gas fumes can get in the car. Obviously this is not realy a big issue for a car as air tight as a Lexus
2nd is that a little back pressure is a good thing.
Yes they all light up when i turn on the switch, and some of them turn off and the ones that stay on are the coolant level warning, the low oil pressure, replace bulb, stop and check battery.
Have you checked the coolant, oil, bulb, and battery?