Just another Kingbrite/Alibaba experience to throw on the pile:
They took 2-3 days to get my order out, and I had it in my hands about a week later. After some of the horror stories I've heard about getting stuff shipped from China lately, I was very pleasantly surprised, and impressed. Packaging was good. No weird shipping labels with a bunch of Chinese on them, unlike some other things I've ordered direct, and the only indicator of the contents was a very small mention of a "lighting kit."
Build quality seems solid enough. I just got one lower-end 240W light to try out but I have a feeling I'll be going back to Kingbrite next time. No hours on the light yet but I see no problems with it.