i think the 100w wud do depends on how big u space is and vent because u dont want to burn you plant personally im using a 100w halogen bulb for 1 plant maybe 2 btw post u questions wiv pics of u grow room so we can see the circumstances of your grow
I am curious why someone would want to use the least possible wattage when that will only insure that their yield will drop? CFL’s are weak to begin with so why not take the other route and go overkill instead of just enough?