This philips hf r td 118 tl d dimmable ballast runs a 1 x 18w t8 fluorescent tubes this ballasts lamp power can be regulated from 1 to 100 digital control input according to the industry standard dali digital addressable lighting interface combined with the touch and dim pushbutton protocol automatic stop start automatic restart after lamp replacement up to 75 reduction in energy consumption and quick programme flicker free startthe philips hd f ballasts are commonly used in offices