YOu already have the correct idea.

The light will heat the grow environment but you need to balance it with your exhaust. You need ideally a variable speed control to audit the air in and air out.

Place a thermometer in room or chamber and check it every 10 minutes quickly.

KEEP ACCURATE records...you will learn that when it is X degrees outside, your inside grow area will be Y degrees. You can then determine the heat put off by your lamps and adjust the air exhaust 'Z' accordingly...