The VC of the stock CRJ-700 has several switches for lights that were never "hooked up". Here are some lines to be added to the [LIGHTS] section of "aircraft.cfg" that will give you vestibule lights (by the exit), light wash on the body of the aircraft when the landing lights are on (fairly realistic), taxi-recogntion lights, and wing inspection lights to check the leading edge for icing.
//Types: 4=cockpit, 5=landing, 6=taxi, 7=recogntion, 8=wing, 9=logo, 10=cabin
light.9 = 4,
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