There's a lot of shady sellers on Amazon. My first LED kit which was supposed to be a HLG kit, was clearly a knockoff when it arrived. Luckily Amazon protected me and I got my money back, even though the seller was uncooperative. I'm not sure what temps that panel might reach. My heatsinks are finned, and most of my stuff is DIY. I'm sure it's more efficient than HPS type lighting either way, but likely as efficient than some better quality boards. I'm a bit biased because they sent me a free light to test out, but I still think that the viparspectra xs series is the best bang for your buck on Amazon currently.