A C185 pilot reported a temporary loss of control during landing in gusty wind conditions resulted in a runway excursion and contact with a runway light.

Narrative

I was cleared to Land Runway XX. Tower advised me winds were 350@ 18 G30. XX-XY were the only runways available due to the others being NOTAM'D closed or special use only. The winds seemed to be as reported. I turned final and experienced a couple of 'sinks' and added power accordingly to arrest the descent and stay on glidepath. Maintaining centerline wasn't a problem; I was carrying about 17 inches of power to touchdown. The touchdown was difficult but manageable. I maintained centerline until just settling the tail. the A/C started a left hand drift despite having full right rudder and a firm amount of right mainwheel brake. It continued left departing the runway surface; struck a runway light; and stopped 50 feet beyond the point of departure from the runway surface. At that point I asked my passengers if they were ok. They both stated they were alright. At that point I continued the taxi up to and stopped on Taxiway 1. Contacted the tower; confessed that I had departed the runway surface and more than likely 'took out' one of their runway lights. They responded asking if we needed assistance. I responded back with I don't require any assistance. They responded back to contact the ground controller. We continued taxi to the FBO and deplaned. Post flight inspection revealed a minor cut on the tailwheel tire and two small marks on two of the propeller blades approximately six inches from the tip on the leading edge. I contacted the chief pilot and our in house mechanic immediately to discuss the damage.