4000K even in T6 or T7 generaly aren’t great so yeah it probably wont be good at all. I haven’t tested 3500K from convoy but it’s probably the nicest they have.
I bought ten 4000k lh351d LEDs from the convoy store on aliexpress and they are very green. I also own one 4000k lh351d that I bought from led4power in 2018 and it has a much nicer tint, so I know its not all of them