Roleadro I've seen a few people posting they were decent and some posting they were crap. I dont think they are efficient at all. If you're in the market for a light and have some decent mechanical and basic electric knowledge. DIY with QBs, strips, or cobs. Is the way to go for sure. And most times cheaper than plug n play lights.
Welcome, Photon6
For a 4x4 you'll need at least 800w(actual) of HID or older diodes like the panels you listed. With more efficient diodes, 500w will do a great job. Ledgardener.com has a ton of info to help guide your decision.