Another how much air query

Basically im about to start growing with 600w MH and HPS for flowering in a REALLY small growing area, overkill yes but i got if for less than a 150w setup

my grow area is 1.30m wide x 40 cm deep and 2.40m high, im basically wondering what CFM i will need to keep these bulbs cooled in a cooltube ?

Thanks
Sx

120 at the most-80 least