On my first PC grow I used 3 daylight (5000K) 27W bulbs for veg and then switched to warm white (2700K) 27W for flowering.
Based on something I read here I'm using 2 of the daylight and one of the warm white for veg this time. I will switch out a daylight to another warm white for flowering. (Has anybody else tried this?) I'm two weeks in on my second grow, and so far it looks extremely healthy.
I used MG and struggled the whole time. It either looked starved or burned. I also had trouble keeping the fan leaves from yellowing and falling off. I don't know if I can blame the MG, but I'm suspicious. This time I'm using some frankensoil from different bags I had around from other gardening projects. Hopefully that isn't a mistake. I just hated to waste it. I hope it works because I probably have enough of the mix to do 4 more PC grows.
I finally got my last grow sorted and stabilized near the end of flowering, started giving 1/4 strength diluted African Violet food (8-14-9), and got a useful harvest and learned a bunch of lessons.
I'm not ever going to be anything but an amature at this, but I will never have to pay for a bag again.
It's all here on RIU. I think I'm wearing out the "advanced search" function.
Good luck