When your basement starts reeking take your fan and attach it to carbon filter inside the tent like you have it and blow through your lites, I thought the same exact thing but the lights are not air tight and when you pull it is going to pull smell through. I have a 1000w Mondo set up this way...
I had the same problem where the bulb was vibrating, I turned my reflecter around so the air flow hit the back of the bulb first, it worked for my set up.