hang

I am building a sip with the intent that anyone can use it regardless of soil type, wick size, air gap, etc. Got done conceptualizing this, took a while but got it together, got some serious symptoms from doing this but I think it's finally hangin and bangin, quite literally. Ok so I went thru...

So my room to hang my buds is connected to my garage so its not heated and tempatures are dipping to 40 to low 50's at night and 50-60's during day what should i set my humidity to on my dehumidifier ?