@Polodk, Hey! I have a link for you, where you can find a calculator which fits quite well.
https://saltonverde.com/de/calculadora-de-iluminacion-led/
If you compare the results to the values given from the manufacturer you will find a good setting. You can find there also interesting informations about the LED and PPFD topic.
The general recommendations which are given there, are also the values I move around.
Seedlings stage:
200 bis 400 µmol/s/m²
Vegetative stage:
400 bis 600 µmol/s/m²
Flowering stage:
600 bis 1000 µmol/s/m²
Last time I had around a PPFD of around 1100-200 in the last weeks of flowering.
like