I took this picture of an overhead aisle light cluster in a Bombardier Q400 NextGen.
I am inquiring about the role of the bottom row of six rectangular lights. From right to left they are yellow, dark blue, dark red, green, orange, and medium red.
My observation regarding these lights:
- The seatbelt light, when lit (and accompanied by a single ping), lights up the green light, for about five seconds.
- A double ping, with the second ping at a lower frequency than the first ping, lights up the medium red light, for about five seconds.
I presume that these six lights are intended for communicating with cabin crew. I would like to know the detailed meaning of these lights.