Unfortunately I don't think there is much left here in the way of talent. Many left for warmer climates. Those still around don't have time to filter through all of the, "can I start nutes after 3 days" questions to get to those that are consequential. It's kind of sad.

Also, I'm not really sure we understand your question. Your fan should be plenty sufficient to cool both the room and the lights. Of course this depends on a number of factors like how long is the duct run, are there any 45 or 90 degree angles in the run, are you using a carbon filter, etc. If odor isn't an issue then no need for a carbon scrubber. Just suck the air from the room, through the lights and out. Pretty simple, no? See the link in my signature for an in depth exploration of fan sizing.