I would try to focus on getting your heat and humidity to a balanced level before you worry about adding any more light, because the extra light will add more heat, of course, and mess with the humidity.
You mentioned that you have the air going through the top of the tent; I would HIGHLY recommend trying to find a way to bring the fresh air in below the level of your light, because the air at the top of your room is always going to be hotter than the air at the bottom, so it's not really cooling the room as much as it could be. We have our fresh air coming in towards the top of the tent because that's the only place we can bring it in from, but that only works for us because we have the air cooled hood and the air outside here in our lovely town is really never more than 65-70 degrees....lucky us!
As far as the humidity, we were having problems with the humidity going to 100% when the lights were off, because we had the intake fan on the same schedule as the light. Now we keep the intake on 24 hours and the humidity never gets over 60%; still a bit higher than we like but it doesn't seem to hurt the plants as much as the 100% did! We noticed a MAJOR stunt in the growing, but it has gotten better now that we fixed the problem.
Anyways, I would try the different intake position if you can. As far as the fan keeping you up at night, try earplugs! lol....don't know if that would work, but it's worth a try to give your ladies the fresh air they need!