Hanging 2 Lights in a standard closet any opinions?

So I plan on doing 2 250's and increasing the length of my SCROG next grow I cannot drill holes in the walls.

Currently I have a 400w that's just ducted out of the closet and being held in place on the floor. Since 2 fans would be a bit over kill is it possible to run one of the 250's without a fan or perhaps double duct the lights together?

Only thing I never understood is how to get ducting shorter any ideas? basically need to make sure my cooling will be sufficient for the reward of a larger screen in a confined space.

I would duct both of them together in the middle, then on the one end will be your exhast out. Then have a fan in the first one with a carbon filter.

Ya you should be cool with that. Just make sure you got good vents, and that temp doesn't get above 85.