So this is slightly off topic but not really, because I am considering buying some SF4000s. So bare with me.
Let's say I am looking to cover a 20x20 space. If I went with SF4000s, I would need? Let's say 1 SF4000 truly covers a 3x3. 400watts covering a 5x5 like the company claims, is not gonna happen. not with results I demand for my money. And the reason I say 3x3 is because EVERY 400 watt light I have owned, couldn't give me enough bang for buck in a 4x4 space. I am not talking about what will grow plants. I am talking about maximum yield/quality for my space. So 3x3 seems like all we could expect from a 400 watt light if we are talking about maximum potential for the plant. BUT seeing as how from the looks of things you are a fundamentalist when it comes to defending these lights, i will say 1 SF4000 on a 4x4 will get PRIME results just to appease you. So, to cover a 20x20 space with SF4000s we would need 25 of them... well where i live, on Amazon its $800 per SF4000. So thats $20,000 before tax and shipping...wow
Let's compare to a 1000w DE HPS set up for the same area. 1000w de hps cover 5x5 easy. So we need 16 of them. You can get those with a bulb (not the best bulb in the world) with shade and attached ballast for $300 on Amazon. So thats $4,800. For PROVEN results that cannot be argued by anyone because HPS works and we all know it. So how long do you think you would need to run the HPS room to eat up the saved $15,200 in electricity? Exactly. They cost more money to cool and all that? Bullshit. How about the bigger yields you get with them making up for the extra fans you would need? How about thc% whats the story on that with the battle between lights? Are we 100% certain that the SF4000/other LEDs produce plants that have the same thc content as HPS or CMH? I dont know. I want UV suplimet added with hps, does LED need extra UV?
20,000 bucks for Chinese lights...i dont know man that seems lunatic.