Can inline fans reduce speed based on the temperature?

Hey guys, I have two Hyper fans with the wired remotes. The blow out fan has carbon filter connected to it to avoid any odor. Hence, I need those fans to run 24hr to avoid any smell coming out of the tent, however, during light time my fans run at full speed to keep temps below 80. However, during the "dark time" if it is running same speed as during light time the temps inside falling below 70 (to 65 and will be dropping lower during colder times that are coming). Hence, my question, is there any way to automate those fans to run at full speed during light and barely blow any air during dark time?
Fans are connected to the temp regulator that has settings for both night and day.

What would you suggest? Thank you.

Yes. You can use a thermostat or they make grow room controllers that control lights and fan by temp.

I don't know of one I can think off. I did a search. One I found even would shut everything down if it got too hot.

I think rhino do a day and night variable transformer type speed controller. You set the ideal temp for lights on and set a minimum idol speed so it doesn't turn right off when temps drop.

Putting together a vent system right now which I will post up, but here is the controller I'm using.

Here's a couple of examples:
https://www.ebay.com/p/Lux-Win100-Heating-Cooling-Programmable-Outlet-Thermostat-021079050109/1600081180?iid=361192952118

I have one of these, haven't used it for a long time but used it for the purpose you describe.
http://www.ebay.ca/itm/Suncourt-Ductstat-Plug-In-Thermostat-Temperature-Sensitive-Switch-DS100-/192270176934?hash=item2cc43212a6:g:XqoAAOSwC~dZvaEd

Guys, I have a "variable" controller - Titan Mercury 3: https://www.amazon.com/dp/B004JKA3W2/ref=asc_df_B004JKA3W25180474/?tag=hyprod-20&creative=394997&creativeASIN=B004JKA3W2&linkCode=df0&hvadid=167127504138&hvpos=1o1&hvnetw=g&hvrand=17744727186873896449&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032015&hvtargid=pla-308859587005

It has day and night temps settings. However, once the inside of the tent reaches out the set temp - 70, whole fan system shuts down. If I set day temp to 68, it will again blow cold air at full speed until it reaches 68 degrees. Therefore, it either blows at full speed (same speed as it does at night when lights are one) or shuts down completely, hence, letting the odor escape the tent.
Instead, what I want is for it to blow full speed at night time (during lights on) and at a minimum speed during day time - just to move the air, no matter if I pre-set temp to 70 or 50 degrees.

Yeah haven't seen anything like that, would be cool though. I've thought about that same thing but never spent any time looking around for one.

Mercury 4 allows for min idle setting looks like.

https://www.growitbest.com/products/702760

It may be hard to find one that speeds up and slows down with temp.

I'm sure it can be done.

Most are made to come on at a certain temp and shutoff at another.

They make them. I use them for reptile enclosures, forget the term you need to look for. Gimme a minute.....

Proportional dimming is what you need. The next best would be pulse but that would be noisy and hard on the fan. Good luck

Thank you guys.