Lighting spectrum and rack heights

Hello Everyone,
I’m looking to start a test vertical farming system. I’ve done a lot of reading but am finding it difficult to find a consensus with a few issues.
I’ve found some strip LED lighting that looks good. The PAR on these lights are; 5cm 325, 10cm 205, 20cm 140, 30cm 78. I tried attaching a diagram but couldn’t. I have been planning on having 40cm between the shelves.
The lights are available in a few spectrums. I’m looking at the 4000k and 6000k ones. Both will work. I’m only looking to grow salad crops.
Does anyone have any thoughts on these? Carry on or am I way off?
Thanks,
M.