Quick light question

I have a 4x3x6.5 ft box and i can get a 600w switchable mh/hps ballast bulbs and a reflector from a buddy for 100 dollars.

With an aircooled reflector would this be to much for a growbox?

Haha well depends on your ventilation, im building a 3ftx3ftx6.5ft grow room and im going to use a 600w digital ballast with air cooled reflector im going to buy a 6" rhino pro kit with 900m3/hr rating. Key is if you have good ventilation anything is possible and i believe ive heard people used 1000W grow lights in spaces that size

Thanks that is very helpful. I just have a bathroom vent fan hooked up in the box now. I have pics of the set up in a different post.