Pretty soon I’m going to be at the fun phase in this project where I’m prototyping electronics! :) I’m developing tools right now, that’s fun too most of the time. ;)
They don’t need much light when they have just sprouted. The ones that have true leaves need more light but not the whole 315w yet, so you have to shade them and acclimate them. Seedlings can be tricky to water at a good interval because their needs change a lot. Good luck.