Not sure what confidence the green light gives? green light = no light in longacre?
As you said, if you turn the key on the light will illuminate. It will also illuminate when car is cold until it builds pressure and shuts off.
So the real question is... What do you do when your green light goes out and red light does not illuminate? Do you shut it off and pull over?
Green light is a nice feature if you need that light staring in your face saying all systems are a go for you to be confident in the system. I have confidence knowing the warning light is working every time I start the car.
Jim
every time you post, i just look at that avitar and envision you passing out that advice and laugh. That is funny and fitting.