Low temps for a few hours?

[fatbuds420]

i run a outdoors-indoors grow. indoors for the night, outdoors in the day. the day temps are around 20-25C i comeback from work at 22pm and from like 19 to 22 sometimes the temps drop to around 10C. can that hurt my plants? considering right after i get home i put them in the tent where it's around 20-22C?

 

[Stunned]

When my plants are in mid to late flower, I turn the furnace to just about off at 9pm, and turn back up when I wake up.
This isn't especially good for my heating bill, but I get great colors on the plants
They grow in the basement which is cool and my temps get down to about 9 or 10C
I only grow in the colder months
No harmful effects to the plants and I get great purples, pinks, and orange
oh, use cold water for feeding at bedtime too