The 4" Vortex does the trick pretty well. Make sure you have a sealed reflector though. My Supersun reflector leaked stinky air so now I'm not air cooling the light. The filter is connected directly up to the fan so I can keep the smell under complete control.
Hope this helps
-Funk
Nice looking grow man. I was thinking about buying one of those & Im pretty sure they come with a built in socket now. I was wondering if you could post A pic of the adjust-a-socket so that I can avoid purchasing a leaky reflector. Thanks in advance.Most of the newer reflectors are better sealed than older ones. Any of the Sunlight Supply reflectors that have the Adjust-a-socket mechanism will leak smelly air. Most of the newer reflectors have built in sockets and cord sets so all you need is the glass. I'd look into a reflector that has built in air-cooling flanges and just use a ducting adapter.
-Funk