Temperature swings

[Zinky]

Hello everyone, this is my first crop I have ever tried to grow I am growing autoflowers using a 4x4x6 tent with 2 viparspectra 600w lights. The tent is in my basement. Anyways the issue I am having is when my lights are on I can't maintain a constant temperature. I have tried to keep it at 74°F when I have my exhaust fan on the temp drops to 68-67°F. So I put the exhaust fan on a timer 1hr 30mins on, 30 mins off hasn't really seemed to help. Anyways are these temperature drops going to have a negative effect on my yield?
Yes I did have some to hot temps and light issues caused tacoing on my leaves, but I have solved that by removing my third light.

 

[Stunned]

In flower, I don't mind my night time temps to go down to 60F
While I don't think it inhibits yield, it can trigger wonderful color

 

[Zinky]

In flower, I don't mind my night time temps to go down to 60F
While I don't think it inhibits yield, it can trigger wonderful color

Mine is not just at night but also throughout the day.

 

[Stunned]

Mine is not just at night but also throughout the day.

that is a problem
Some inexpensive radiant electric heaters might help?

 

[Bigjake8]

Look into a temperature switch for your exaust fan that way you can control the temp a little better environment is 90% of the battle I would say turn your fan down a little and run it but a fan control is about the same price as temp switch but you won't have to change it when weather changes