It is very difficult to vent my lights. So the only venting will be the a/c exhaust. I have a nice portable unit and the dryer vent is on the other side of the wall.
If you can vent the a/c you should be able to vent the lights. Put a wye on output for the ac and hook the lights up there. Portable a/c are not as good as split a/c. 14k portable is like 9k btu of normal ac. I think you will need to at least vent the room.