I've used "Anthony" ballast out of City Lighting in PA. But I've also used 3 lamp instant starts which are rated to cap one lead and burn two f-58. They will burn less bright in a freezer/cooler than an Anthony but my experience is that i was the only one that noticed. Anthony =$100. 3 lamp Sylvania= $15.. I assume your talking reach-in/ public access freezer/coolers .