Need help will this be ok ?

ok peeps need some help
am soon gonna be loseing my spare room where i keep my tent
have been trying to find somewhere to move my grow and the only
place i have is a space 200cm,70cm,120cm (LxWxH)
now to my equipement list i was thinking..
18mm ply box to fit space
Nutriculture Ebb & Flood EF420 (176x62x36)
25cm space to scrog screen
2 x Icarus Large Air-Cooled Reflector 20cm hight flush to top of space
this would leave me with about 350cm from the screen to the reflector glass

oh yea lights will be 2x 400w with a 6" fan

My only concern would be heat, 800w is a lot for that space but if you're using aircooled you *should* be fine. Just make sure you have more airflow than just the 6" fan, you'll probably need it. Looks like an awesome setup though, definitely jealous if you can pull it off beautifully.