I have to questions here, usually on boeing and airbus planes i notice that the left side wing has a red light and that the right side wing has a green light.. but on MD-80's i notice that both of the wings has white lights on them... ain't the color of these lights regulated by certain laws, like if they should be green or red? like why is it on boeing and airbus that they are going under the same rule that the left wing has red light at the edge and that the right wing has a green light, while that is not the case on Md-80's?
Second concern is, the wing blinking lights, now i know that the belly and the roof lights of the planes means operating aircraft, but i was on a british Airways flight to london, and i was seated beside a window seat, i noticed that the blinking light wasnt operated until after we where pushed back from the gate in Dubai and after the engines started after push back. so when is this light supposed to be operated? before pushback or after and does it stay blinking all of the flight? i wasnt able to observe at night because on every red eye flight on a 777 they ask us to lower the windowshades.