Yes, tip landing lights, with additional landing lights on the gear when it's put down. Would have easily had power as if I remember correctly, the landing lights will revert back off the main battery. Flaps were also electrically powered.
I also wonder about this report of the main door being opened. The Westwind has two outflow valves under the main door on the bottom of the fuselage which are pneumatically closed. These valves aren't like the airliner door type design and you cannot manually close them. You wouldn't need to open the main door to have water come flooding through the front of the aircraft.
Also the main door has inflatable door seal which when deflated was quite easy to see daylight through...