Burned out shelf light

It's already been a couple of years since I installed those shelf lights. They originally had US-made GE 15W soft white incandescents. Now the last US-made ones are burning out. Out of 6 sockets, only 2 now have them. 2 have China-made GE, one had a tubular 15W lamp (ceiling light in background), and the socket with the burned out GE lamp pictured has been relamped with a China-made Philips. The local Canadian Tire had no GEs left, and the local Wal-Mart stopped selling 15W Soft White even before they were outsourced from China, so I had to get Philips lamps from another hardware store LOL. I bought 8 so I have a few when the others burn out.