Need help on 400 watt tent set up plz>

is there a way to vent my 2-400 watt hps lights? One is a batwing reflector and other is just a noncooled hood. Can I just run my carbon filter with 400 cfm blower right above the lights? I dont want to go buy new hoods since the lights arre new. Can I have a y with each duct hose sitting inches away from my lamps then have the blower suck air from lights>carbon filter>fan> then back out for exaust??? Any ideas fellas?

How big is the tent?

4x4x7, with 2 400 watt hps. Whats up with passive intake? is it true i dont need fan blowing air in?

The tent is 4x4x7.

You only need one lamp for a 4x4.

I think you would need a cool tube for a tent. I had a 2x4x6 grow box and it was overheated with fluorescent lights even with air conditioning piped into it and with a carbon filter drawing air out. I had to move my plants because I couldn't afford to fix the box better. One of your 400 watts will cover the tent, but it will also fill the tent with heat much faster than my fluorescent bulbs did. I'd go with the cool tube if you can get one.

If both of those lights are non air cooled then ur gonna need exhaust and intake fans. I have one 600w cooltube in a 3x3x7 and my 250cfm inline fan isn't enough!

Get a big exhaust fan like 500cfm and an intake fan probably a lil smaller so u have a little negative pressure