Agreed,way under light,the least you could get by with would be with 3 400 watt hid systems to use the entire room,leaving you enough room to work with.
Even though what you have seems bright right now wait till you get that room filled with plants & you'll see,your lights will create very stretchy plants,loose slow growth buds with very low yeild & bud growth will be non exesistent below the canopy.