dude u dont need any special reflector to cover a 4x4 space with a 1000w. just set that shit up and it will cover it fine
i cant even find anything that says how much area the mondo reflector covers. another guy at worms way says i should get the ultra large hydrofarm reflector for a 4x4. that would be comparable to the mondo reflector
1000 watts is a lot of power for that small of an area, reflector won't change things, shit I'd go with a 400 watt system, unless you got a "mondo" plan for the heat problem you're going to have on your hands.
A 1000 watt system is no joke, you may want to rethink your purchase.