questions on exhaust fan ?

[sleestack]

need advice on a new fan , the room is 5 x 8 , i may use a 600 hps or some led, i no the heat will be very different on the 2 lights so , i want a fan that will work for the worst case. the distance will be about 30 feet of 6" duct to reach my vent with 2 90 degree bends , so im sure ill need a large cfm fan ,
any thoughts on a fan that will work and be somewhat stealth !!! quiet , what are some of the most quiet fans???? vortex ? and what size , thanks

[Dexter007]

its eay do google that up..use your brains..and no need to post same thing twice.