Hey man i would say you got yourself a good set up with this pc case. I grew a strain called Ice with only 1x23w bulb and the other one was 45w and i got a nice plant.
Keep taking care of them and try not to let the heat go crazy inside the case, i know i had that problem maintaining a constant average of heat.
Also i suggest you go flower after the third week because they take off during flowering. You definitely can get like 10 grams if you do the right techniques (unfortunately that is not my area)
BTW i like what you did with the humidifier that's an awesome idea.
For my next grow i plan to use a tower pc box and i have a ufo 90 watt grow light. It doesnt heat up and wont make your bill go up. I heard they are the same as a 400w hps bulb but i dont really know if that is true.
Good luck with your grow bro, its always great to smoke your own grown herb.