4x4x7 Grow tent - Fan speed for passive intake / low humidity

So, probably beating a dead horse here, but I've searched google & the forum to no avail.

I have a 4x4x7 tent, I run two separate fans - one for the cool tube, one for passive intake, both are rated @ 240cfm's. Where I live, the humidity levels sit at 16% constant during the winter. I have the passive intake exhaust fan set on a speed controller.

I'm wondering, should I keep the setting on low for the room exhaust to induce a higher humidity level without ruining the air exchange, or should I put it on high and seek alternative measures (like a humidifier, etc).

I've been fooling around with just one plant now for about 2 months and it's seen some heat issues due to the 1000w dimmable ballast, which I turned down to 50% and lowered the light close to the plant and it seems to enjoy that much more than being set on 100%. I know this is in part due to having a crappy inline duct fan cooling the light - which will be upgraded when I figure out the odds and ends of controlling my environment.

As always, thank you rollitup community for continuing to give me great advice.

i would try a humidifier. What is your RH and temp inside the tent lights on? And what is it lights off?

Depending on if I put a tray of water in there it can go up to ~24 RH with lights on, up to 38% with lights off.

38 being the absolute highest.

Without placing some sort of large try of water in there, it sticks to the 16% RH. That's with the passive intake exhaust fan full crank.

In the mean time put a towel in your tray of water with some dry parts sticking out it works better for some reason. I would get a humidifier. If you get a cool mist humidifier it won't increase the temp at all so your RH number will be easier to hit. In my case it actually lowers the temp by a degree or two. Only thing is having to fill it up every day. I don't know how big of one they make or you can fit but mine is about every 24 hours and fits 1 gallon. Regular humidifier raises the temp pretty good making the number harder to achieve