4x 600 watt air cooled shades linked up, what size cfm fan?

i would like to link up 4x 600 watt lights in air cooled shades and use an extractor fan to push the air through but have no idea what size extractor would do the job.

i have a 6" inline that can move 400cfm and i have a 10" acoustic that can move 800cfm if that helps.

The 10 inch will do. You could use you six at the begininingof midway of the lights and have the 10 at the end. but i think just 10 will do. remember the air that you draw threw the lights has to e cool though

6" should do as well. 4 1000's would need at least a 8". put fan at end of line to vent outside and it will draw cool air in at
front of line.