Yes it can, a thousand watt bulb is made to run at just that. Dimming can ruin the spectrum quit a bit. I use a lot of switchable ballast so instead of diming it can take a 400, 600, 1000, watt bulb or super a 1000 to 1200 watts.
Use a bulb that matches the wattage output dimming is not I good idea. I learned a lot about this after spending forty minutes on the phone with several sunlight supply techs.
Even though they make dimmable ballast they said not to use it, it will work but at spectrum cost.