I'm in the process of adding a solar
array to an overhead camper I just bought.
It will be the same system I've installed on three eggs and another overhead camper.
I have used at least 25 1156 36 led panels lights
purchased on ebay.
They were about $3.00 each 3 years ago now there about six.
The panel is held to the reflector of the fixture with high bond tape.
They are comparatively inexpensive and put out enough light to comfortably read buy.
Because of the price I bought a couple of spares but have never had the need to use them.
One of my sons has the trailer I first added solar
to 3 years ago and has yet to replace an LED panel light.