Is this a good growing PLan?

I got 1 northen light Plant under A 60 watts Light.I have Central heat for every room and In my Growing room I keep it at a steady 67 degrees.Soil is Perfect Grow and miracle Grow Mix.It feeds the plant up to nine months.My other two are white widow and a shake seed.everyone of my plants seem to be Growing Everyday.I also Keep my plant room light for 24 hours one day and dark for 24.They are only 2 weeks old. the shake and northern light stems are taller than the planting Pot.My white widow is a little younger but she is getting up in her own size.I was wondering if this is what i want at such a fast pace or am i just setting my Plants up to fall.Thanks in advance.

ok my fellow grower
my opinion is to get a timer and set it for 18/6 turns on at 6 in the morning and off by midnight!!
or how ever you likes!!
but i do it like that so that when the lights is off they wont be interrupted by me opening the closet and etc..
and most people here advice not to use soil that brings nutes because you have no idea when it feeds the plants and
you might just over kill your plants when adding your nutrients to the mix!!
and i might add more lights faster grow!!