?????venting blowers fans????

hello i have 9x6 flower room with 1x600w 1x1000w lights a good window ac an a 160cfm booster fan and 2 squarel cage blower fans. i can get a 6in in fan for 120$ but my ? is could i use the blower fan mounted to the wall to the light cool the lights or should i get the inline and is the window ac enough fresh air for th flower room and what could i use the booster fan for?

Iwould go for the 6" inline fan for cooling your lights. You could use the booster fan to move some air to the veg room, as it will need some air flow too.