Yeah HLG will ship out next day from my experience, I'd get my money back from that shop and find elsewhere to do business.
I have a 288 bspec in a 2x3 veg cabinet and I love it. Very powerful light. Was just talking to a buddy about this last night. We both have to keep them turned down and away from the plants. I wouldn't be surprised if one of these could veg a 3x3 without a problem. Crazy bright. Definitely recommend. For less than $100 for board and heatsink from hlg, and another $60 for a driver, its hard to beat