Humidity Problems Dresser Grow

Having issues with humidity, I'm 3 weeks into flowering; my first grow and I have just noticed that the humidity is 80% during night hours and under 50% when lights are on. Hopefully no mold!
My extraction fans are running 24/7 and there is lots air flowing around the dresser too.

I'm tight for room so i need something small to sort out the humidity issues.

Would this work? Check attachments I cant link yet.

I currently have the aircon running in the room with the dresser hopefully that will bring the humidity down.

Thank you!

Id get a 20liter dehu and stick it in the room your grow tent is in .

Those small ones barely work at all. And youll be returning it befor you know it.

Ya bro the humidity drops when lights are on because you probably got yoyr meter in the light. Light obscures readings on both humidity and temp units.

I just give this info as standard to all new growers