how about adding something like this to the mix
@MedCzech ...
just had a look at the same brand I bought the cobs from. Unit is expensive but willing to put in the money.
https://opticledgrowlights.com/products/optic-2-210watt-led-grow-light?variant=2643190054951
With that I get two extra cobs, plus the led's for UVB and IR.
Im sure theres cheaper options, trawling through the internet but not having so much luck right now.
Anybody else who knows of good lights for UVB & IR supplementation would be great to hear from you.
Cheers