Units are heavy duty, all worked nice and bright, easy to install, fast shipping. The only negative is I would have thought they would have supplied wood screws. They supplied concrete anchors.
It is hard to determine if you have turned the light switch on in the daylight. I thought I had them turned on but had to reset the switch on some lights after dark to light them up.
Excellent quality even thou made in china and pretty tuff as I got them bolted to edge of my driveway and I ran over them a few times and no damage and supprising how bright they are and and last all night and so good neighbours asking about them.. I got green ones and I suggested that neighbour buys the blue ones so we dont get drive ways mixed up.. so they better than I thought and well made.. suprise suprise..
These lights were simple to install on the dock - just remember to turn on before fastening to the wood. They look nice, provide sufficient light and are sturdy. It would have been nice to have access to solar batteries - my only complaint.