This Week, nothing really special were done. Mostly some further LST and of course watering. At the end of the week I started using toothpicks, which looks a bit brutal :)
Don't wonder about this small bit of aluminum foil on the soil. Was just thinking that it might reflect some more light for the top of the plant, but of course this makes not really much sense... :D
@Zarayju, Sorry for the late answer, I was not checking here frequently.
I've bought those from Lientec-LED. They also offer a lot of DIY-Sets. Keep in mind to also order some aluminum profiles, as the heat of the LEDs needs to be dissipated.