Plant's don't grow (autoflo)

7 days? looks fine.. stop fiddling or you will cause a problem. You likely need to raise those COB LED further than 20cm... more likey 40-50cm (~24"). you could be stunting them at that distance - especially if they are in the hottest spot of the light's footprint. 100w should be good for a 2x1 or slightly more. 50w would work for those little guys in a 1'x1' space or so at 18-24" with CoB LED. watts are a horrible measurement for this... umol/s would be better to work with. in vege early on 40-50umol/s per foot squared is about all you need. That would be near and over 500par in a m^2. you'll want about 150% of that in bloom due to 33% fewer hours of light. Math is fun.