For companies looking to make their fixed output linear T8, 4-pin CFL and T5HO fluorescent systems more cost effective and sustainable, Mark 10® Powerline ballasts provide an easy solution without the need for additional control leads. Simply, (1) replace the ballast, (2) replace the switch, (3) dim the lights, that is all it takes. Its that easy to bring the convenience and flexibility of fluorescent dimming to conference rooms, private offices, auditoriums, architectural cove lighting - anywhere dimming is required.