Ballast resisters

Thanks, I have been using RU11 and I believe its specs at 1.8 which could be too high?
Napa Echlin ICR11 (1.35 ohms), Napa Echlin ICR23 (1.2), Napa Echlin ICR34 (1.4), Standard RU-4 (1.35), Standard RU-23 (1.2) and Standard RU-37 (1.4). I copied this off this site a while back, good to have.