duel

Is my first time growing and was wondering what are you guys thought on using duel fuel I'm currently germinating 2 white widow feminized and 2 Jack Herer feminized auto flower Thanks for your input

Hey all ! quick question , I saw that there are few type of ballast . one for hps , one for mh , and one that is duel for both . Now I need a 400w ballast , but in my place there is no duel ballst , do I really need to buy both ballast ? I saw manny warnings that I REALLY should'nt...