A few points:
• Keeping the soil moist has nothing to do with flowering. This will invite pests and mold! Water to saturation with a little runoff (about 10% runoff) and let the pots dry back until lightweight, allowing the soil top to dry.
• Your plants look like they are stretched and reaching for light. You can either turn up the intensity on your lights a bit, or move the light a little closer to the tops of the plants.
• The conditions outside of the tent directly affect the conditions inside of the tent because we pull air into the tent from the room (called the lung room). If you are consistently experiencing dry air inside the tent, then you need a humidifier. Conversely, if you are experiencing too humid air, you may need a dehumidifier. However dehumidifiers typically are located in the lung room so the air drawn into the tent is drier. It quickly becomes obvious that the conditions in your lung room are fairly important and directly contribute to the conditions inside the tent.
• There exists many different controllers available to control temperature and/or humidity by either controlling intake/exhaust fans, humidifiers, and dehumidifiers. Taking some time and reading some growing information geared towards beginners would go a long way here. Having a basic understanding of good growing conditions will enable you to come up with a plan and execute it.