I dunked the Rockwool Cubes into 300ppm 6.5ph water mixed with small amounts of power roots and Supermix.
The holes in the rockwool cubes were quite big so I'm not sure how they will turn out. At least I tried covering the seeds with some rock wool to keep out light.
The TS600 is positioned 60cm above the rockwool cubes.
Personally for germination id just raise it all the way up and let them stretch for the light a bit. First set of true leaves you can drop it down to around 24" or whatever the manufacturer recommends