Warranty problems. Lights are great when they work.
I bought four of these lights. they are really great lights and my flowers grow wonderfully under them. However, one of the drivers stopped working, and I am having trouble communicating with the manufacturer. They come with a five-year warranty, but a warranty means nothing if the manufacturer doesn’t respond when you have problem with the lights. I have only had them for nine months. Maybe one day they will return my emails. Until then, I will be an unhappy customer.