The state of the art for drone-based lighting options continues to improve rapidly. Check out some of the great footage rctestflight got with a drone-mounted 1000-watt LED light bar.
This config can only go about 10 minutes between battery changes. Keep in mind the Freefly Alta drone used will set you back about $12,000, but that is sure to continue dropping. These could also be used for search and rescue or other situations where a helicopter is cost-prohibitive. Also very good for UFO pranks.