Cooled reflector necessary?

I run 250w in a 36"w x 20"d x 65"h tent. I have always run with the tent open because of temps. I have decided i have done that long enough and am getting an in line fan. I am looking at a 440cfm. I had also considered adding a cooled reflector but I am not sure that it is needed to properly cool my tent. Anyone have or had a similar situation?

Thanks all.

Get a cooltube and you will nearly double the harvest. You can get the plants very close and buds finish much harder and heavier.