I bought 2 units of this product. The first one worked fine. I had problems assembling the second one because the middle part tubes didn't fit together very well. I also had troubles with the lamps' screws since they weren't able to hold the weight of the lamp-light bulbs (as I tried to adjust the focus and direction of the light) :( I had to tape them. Other than that, I use them in the living room and in my bedroom. Three lights are enough :)