Funny story about idiot lights:
One of my EAA brothers put a fancy computer thingie in his KR2, which was a very good thing and a sorta-not-so-good thing.
Good in that when his original engine, a long time one that was billed as "good running" turned out to be the opposite of it, and when the oil pressure plummeted he made for the runway and had it crap out when he was in good position for a safe landing.
Bad in that in re-programming it with the newly rebuilt engine one of the parameters wasn't programmed correctly, blinking red at him when something hit the bottom of one of the operating ranges (I can't remember which one). So it was yelling at him that everything was working okay. He was about to start saying many bad words back on the ground when he decided to check the computer stuff and then started laughing when he spotted the issue and corrected it.
Um, I'll bite, May, what's a green landing light?