i love my cooltubes ,
mine are the type w/o the reflector inside the tube . 100.00 usd. each .
i have an 11 x 12 ft. room w/ 2-1000w. hps. and good hurricane blowers n temps are way low . like 75deg. ambient air temps . you can lay your hands directly on the tubes n no burning yourself . i you have a straight enough run i bet you could cool all 3 if they're in a straight line w/ a 8in. hurricane or vortex blower .
peace
crispi