First LED grow light test

As soon as I started to see the first proper leaves appearing I thought it was time to start adding some A+B to the waterings. There's much more root activity going on at the moment than anything above the surface, so there's no point giving too much....it is an auto after all and they don't like large amounts of fertiliser and can easily get nute burn if you're not careful. No EC or PH measurements going on at the moment since the nutrient solution is so weak I don't see the point. Shortly some grow media PH and EC logging devices will be getting put in to the grow media, and the nutrient solution and run off will be getting closely monitored as well once the waterings are of reasonable volume. At this stage chasing things will just get me in a twist, so simplicity and lighting control is my main priority. Approximate light per plant has increased to PPFD 220 since the plants have grown a little closer to the lights. DLI is somewhere around 16 so they should be fairly happy for the next few days if I don't move the light or change the dimmer setting. Planning to start adding some Silicon to the nutrient solution (Buddha's tree solar green power) but I can't find any in Germany. Maybe someone can suggest something similar that's not going to change the npk of the feeding. Decided to move the plants a little further away from the light after the 6th day just to see if they respond a little differently, they had a little turning up at the points on the leaf edges so wanted to see if the light intensity was too much for them at this stage even though technically it should be around the perfect level for them if 25% dimm setting really does mean 50w. After all this grow is simply a light quality test so not doing anything with the growing techniques