Grow room/box setup basically complete, 1 question though. (Video Included)

Please watch the video.... If the link works.
My light shakes from the fan going through the cool tube, bad thing? get more duct to decrease fan speed?

http://www.youtube.com/watch?v=tIdGcKuJFB0&feature=g-upl

now i cant really tell but your fan is that tub on top of thew grow box? or u mean that little fan on the side? either way its not good slowly it will vibrate enough to unscrew your bulb i bet, its better to move the off (if is on top) or attach it to something with a little more room to move to absorb the vibration from the fan.

Yes it is on top.
I was going get some more air duct to extend the flow before it goes into the tube.
I hope with the lighter air flow the heat will still be kept to a minimum.