I was once hauling a trailer with no night time lights that worked. The turn signals did.

When it started to get dark I pulled into a Walmart, bought some $1 flashlights, dug some soft drink cans out of the trash, and used some tape to mount the cans as reflectors and the flashlights as running lights.

They lasted until I got to where I was going.

I even stopped for gas in a small town and a cop pulled in to check it out. He had been following me and wanted to see what I had rigged up. I asked him to check on wagon lights being necessary and sure enough, my set up was as legal as hanging a lantern off the back of your wagon.

He was not upset. To him this was a great story to tell at roll call.