Those strips aren’t available like that anymore, they’ve been replaced by a second generation. If I was going to build a light for a 2x2 with them right now and wanted dimming o would use something like hlg-120h-c700a with 10 BXEB-L0560Z-35E2000-C-B3.
That would be around a 150 watt light and plenty for 2x2. See if you can get a discount code for signing up on mailing list at arrow electronics. If you can get 10-15% they will be your best bet. But before you order make sure to measure internal dimensions of your tent. You’ll need full 24” to make a 560mm strips work.