Blue mystic grow

Hello out there everyone.This is my first post and im trying to figure out the lowest temp i could grow blue mystic under i am currently using a 6 bulb t8 lighting fixture.
I have 5 seedlings that i just germenated a couple of days ago. 1 is doing real well
and the rest are slow to follw suit.I have 12x17 foot garage i am growing in so if anyone out there can give me any pointers that would be very helpful thanks.

You don't want too cold temperatures.
Plants can handle anything from 16-32 degrees Celsius without any problems.