Originally Posted by
hoffmanj
Just a guess - it can show the FA's who is using electronic equipment when it's not supposed to be used (i.e takeoff and landing).
This rationale doesn't make sense -- the power is disabled for takeoff and landing, so it shouldn't matter.
That said, I've never noticed a blue light. Is it only in coach? The OP wasn't clear. If so, that's why I've never noticed it.
