Whatever deals they were making outside of alibaba was against that sites terms. They have recently overhauled their system and I suspect it was to cut back on some of these outside dealings. The website is pretty straight forward, no need to email anyone imo, the products are all listed and described pretty clearly. If you want to order you just pick the one you want, select the options, and checkout like any other ecommerce site.
Shenzhen Kingbrite Lighting Co., Ltd., Experts in Manufacturing and Exporting Led grow light, bar grow light and 0 more Products.
kingbriteled.en.alibaba.com
Go to the products drop down menu near the upper left of the page.
The difference between the three is kind of in the perspective and hard to quantify. Part of what makes it a little difficult is that
hlg suggests their lights are suitable for more sqft/watt than timber. If I were to judge them based on how well they perform over their recommended foot print as a single light then I would say that the
hlg does not perform as well as the timber. The
hlg has more drop off towards the edges of its recommended foot print but the timber has the greater drop off outside of its foot print.
So for example my 3vl's are recommended for a 4x2 space with 320 watts each and my two
hlg 600's which are really about 620 watts are rated for 5x5 (both flowering). My flowering area is 4ftx12ft with my two timbers bookending the hlgs in the middle. I have the
hlg's each covering only a 4x4 area, using and judging them in this manner I see no discernable difference in performance between the lights at all.