In case this fantaistic anaslysis by Northern_Loki at OverGrow has not been discussed here, it’s a must read for Fluence-philes: A Detailed Look into the Fluence Bioengineering Spydr 2P
We will use the new Fluecne SPYDR 2H for our two-tier mobile carriage flowering rooms and the SPYDR 2P for the 3-tier mobile carriage veg room.
I sent that thread to Fluence when I asked them to provide a spectral distribution for their R4 (PhysioSpec Indoor) spectrum used in the SPYDR series:
Here is the reply from their Hort Sciences team:

