Low Humidty?

Jan 24, 2017
My humidity is only at 30%, as you can see my humidifier is in the back left at 100%, is 30% to low? Also tomorrow I'm going to turn up ballast to 100% (75% now), my leaf surface is at 76, I heard it should be 80, without fear of light burn. My grow room is a closed room right now, I will vent out widow when temp might be a issue. Any advice most welcome. Happy growing, and Thank-You! -R
Vegetation, 3 weeks
Chronic (hybrid) from AMS