The window a/c that you have will cool up to 4 1000kv lights just fine (especially since yours are vented) and it will double as a dehumidifier. The downfall to these units are their energy consumption. I have a 12,000 BTU unit and it draws 11.5 amps! I invested in a 3 fan chiller and now have 3 more lights going with the same electrical bill as i had when using the a/c unit. I love my swamp chiller. Peace.