I began with 9 plants underneath 4 four foot fluorescent tubes. Space became an issue so I gave 5 of them away. Three of the remaining four were males so I annihilated them about a month ago. This was about the same time that I purchased a 150 watt HPS security lamp. Luckily the plant that has survived is a Dank/headies/KB strain. (the buds are bright purple) She began to flower about 3-4 weeks ago. The temperature is around 60-70 degrees in my grow room due to the window unit air conditioner I "Installed" last week. I'm interested in putting a humidifier in the room, will this have a significant impact on the potency of my yield? Is it too late to do so? It has thrived well so far in it's current conditions which is why I am not very eager to change them. I am no expert however this is my first (successful) grow. I have no idea what the humidity percentage is but it is a closet grow with air intake from an attic-like space. From what I have read the air is probably drier than it should be. Any input?