Problems with heat

i have a grow in an attic my space is L = 220cm W = 120cm H = 170cm at peak. i have a 150mm inlet fan and a 100mm outlet fan both ducted directly outside and i have one 600w lamp but still the temp is 92 degs max and 83 min. Can anyone give my anyone help me with this problem. cheers

you can try an AC to keep the temp lower in your attic.

Try buying a stanley blower from walmart. Its $45ish. I had heat issues too. Place the blower above the light. Suck the hot air into a dryer vent connected to the exhaust of the blower and out of the attic. Temps for me went down about 15 degrees.

what are the outside temps? If the heat is due to the light go for a cooltube.