We are referring to them as cheap lights because they are cheap.
But they are Quantum boards, and better than a lot of the lights out there, and will do a good job with your plants as long as you don’t cheap out on the wattage.
They are most likely not as good as the Spiderfarmers, but probably not far off. Every guy who got a good price and sees a good result in their harvest wants to believe their purchase is just as good as the name brand. That’s what fuels your belief, as well as those reviews you read.
The reviews for my budget quantum boards said the same thing. “I’m running a spiderfarmer4000 right next to my Kuarez 4000 and I swear the Kuarez is brighter at almost half the price”.
I’m sure those bloom pluses are nice, and I would buy one of those if the price was better than my budget board price. But I have a lot of them - I’m shooting for >40 watts per sq ft of quantum board light.
The only reason the Bloom plus 3000 is rated for flowering a 4 x 4 is false advertising though.