Sylvania Quicktronic high efficiency PROStart® T5HO electronic ballasts operate PENTRON HO, PENTRON HO circline and DULUX® L T5 lamps with full lumen output and optimal system performance. These ballasts provides nearly twice the light output (188%) of T8 systems, with the same number of lamps, allowing many new design options. One lamp fixtures can now be used in place of two lamp models. Offer a minimum starting temperature of -20degF (-29degC) for PENTRON T5HO lamps. Quicktronic PROStart® T5HO ballasts are RoHS compliant and feature lead-free solder and manufacturing process. The two lamp unit can be wired for one lamp operation, allowing for an additional 50% reduction in inventory model numbers. The ballast has a 30mm x 25.4mm cross section which allows for smaller and unique fixture profiles. Setting the standard for quality, covered by the quick 60+® warranty, the first and most comprehensive system warranty in the industry.