Rubbermaid grow Heat issues

Alright my first grow went ok till i had to destroy them (sad day) a month left and i had to kill all 5, 4 turned out to be females, the last was unknown. Oh well onto this grow. Its in a small 18 gallon rubbermaid tub.i spray painted the tub black then white so its stealth. I have 4 26 watt Cfls, I'm going to go with more once they get bigger and i move them to my other rubbermaid tub. i have a small 4in Pc fan for the intake and outtake, it gets to 86 degrees, should i get a bigger 120MM fan which is atleast 2 in bigger, or should i just put in another 4in?

my rubbermaid gets really hot...i have 2 of the huge ones stacked on each other and i can barely fit my 3 plants in there...but i leave the top lid off when the lights are on with fans blowing down

i would love to do that unfortunately i cant, it has to be stealth, im not home 15 hours out of the day and i dont want anyone finding it

put another four inch in for exhaust one intake will be fine

Do you have any way to cool down the temperature of the room that it is in? What is the temperature in the room?

Its in a basement, The temps are 74-77, No i have no ways of cooling the room down without cooling the whole house down

74-77 is good enough, yes just put in a bigger fan. Make sure the intake is down low and the exhaust is up high.