Yes, one controller can handle pars and int. lights! Controllers like the Operator and Show Designer can handle both easily depending on what you want to do. The best thing to do is to program scenes and chases (designed to best fit your club set-up) that can be called up anytime. Note: some M***** lights use a different protocol than DMX and need a M***** controller or an expensive converter. Forget M***** and get the ADJ stuff!!!!!