I’m fine with knock offs if it’s the same diodes and drivers and they can be easily exchanged here in US. If I have to take videos of the light and sent it to the manufacturer to China than wait for them to send me new one I usually pass. Lost time lost money. So I rather pay more and if anything I can switch the light at my wholesaler. Knock offs like Luxx lighting for example don’t even know what type of diodes, drivers, Umol etc they got when you call their rep. After one harvest it’s well worth it. I’m sure there are way superior companies then Gavita for a fraction of the price. I just never had time to gamble.