I have never had that happen, just a humm from my ballast. Are you sure you are using the correct bulp in the ballast? Some are meant to burn vertical, some horizontal, some are universial. If unsure look on the ballast for the number.
Don't feed it yet, that is why the leaves have dried up and the tips have turned brown, nute burn. That is a classic sign. They don't need nutes for the 1st few weeks. Calm down and just give them some water. And does your mate follow you around 24 hours a day? You can't sneak off and water your...
It could be a little bigger i guess. 105 watt is the actual, or equivelent? Get a PH kit check the runoff. It seems a bit too soon to have any lower leaves dying off. You might have an issue somewhere. I have never mixed my own from scratch, just added to a pre made mixture. You might need to...