Did you mean cm? 200mm in height is around .6 ft if i converted right, which isnt enough room.

If you meant cm a 400w mh in your veg room would be 26 watts/square foot which would be workable. A 600w would be better, the grow room I'm setting up now has a 600w over about the same area.

In your flowering area you could run 2 600w hps, this would give you just under 40 watts/square foot which is a bit low, its recommended to try for 50 watts/square foot. 2 1000w hps would be great in that area if you can control heat. Would give you over 60 watts/square foot. I'm fairly new so maybe someone else can chime in with a better answer, but this is what I've come up with from research. Good luck on the grow :rastasmoke: