This Philips HF-R TD 139 TL5 dimmable ballast runs between : 1 x 39 watt T5. This ballast's 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 start.The Philips HD-f ballasts are commonly used in offices. These units are for use with installations with emergency back up.
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