I was very pleased when I first started using this product in the Spring.  I even brought it indoors when I knew it was going to rain.  The light was nice and bright and came on at dusk and stayed on until around 3:00am.  However, as the Summer went on it was noticeable how the light was dimming and the duration was shorter.  Now after 6 months of use, it barely shines at all.  Very disappointed in the longevity of this product.  I will not purchase again.