How can lower temps in my tent

Ok, this driving me crazy, finally got my girls ready for the flowering tent, it's a homebox Xl(4x4x7). Have two small circular fans inside tent, portable ac unit outside tent going, I also have a fan on my 600 watt hps cool tube. Running temps in 90's, WTF am I doing wrong?? Need help with this one. Also do light leaks only matter during dark period or for when lights on also??

Can u put portable ac inside or run duct from ac to directly inside your box? Where are you venting ac exhaust to?

can u do what was suggested with the ac? you can also run your lights during the night which really helps temps alot and it doesnt cost a penny.

hope you dont mind me asking but where is your cool air coming from into your tent? does your cool tube take the air from in the tent or outside? i'm buying a 600 hps and 4x4 tent at end of this month and after a bit of research heres what i'm planning on doing running a cool air feed from out a window to a cool tube which will have a 6" inch inline fan and returning the hot air from the light to the room (outside tent but not out window) will also be running a 4" fan to bring another cool air feed into the tent and a 2nd 4" fan to exhaust the hot air from out the tent into the room but this will have a carbon filter on the end. the 4" fans will both be set up through a control thermostat so only come on when the temps to high but the 6" cool tube fan will be set up through the same timer as the light

i know ive not set this up yet but from doing a bit of research jus thought it may be of some use to you