My solar post caps work perfect with the sun.  I place these in my background  for extra light at night. It is on the edge of my fence. I had to do a little  adjusting  to make it fit but that was okay. I like the light it give out at night. It not too bright air dim. I able to see the handle of my fence at night.  I like how it give enough light for me to see the ground.  This are also very pretty.