Can you replace either a) the whole remote ballast unit to one that has a longer distance -or b)replace just the "guts" of your existing remote ballasts with a replacement ballast that will go the distance -or c) Make the fixure an integrally ballasted fixure (long shot).
What ballast/lamp are you using? I was always under the impression that it was 15' max for electronic ballasts, and 50' for magnetic core/coil uints.
