After receiving our lights, we put them out in the sun and the first night they were a little dim considering they hadn't had a lot of sunshine.  Next evening we noticed they were still a little dim and one of them had no light at all.  Ok so we thought let's make sure the one that didn't light was in the on position.  It was, so we decided to give it one more try and by that time they had all been in the sun for a long period.  Once again I have 1 light that will not come on, so I am a little disappointed in my purchase.  I realize I only paid 18.00 for the set, but I expected for them to all a least show a little light.