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The SL7-BL24-R is a LED Flashing Light Module with black polycarbonate enclosure and a red polycarbonate cap. It is suitable for SL7 series signal tower. 4000VAC Rated impulse withstand voltage 250V Rated insulation voltage 2Hz Flashing/strobe frequency <0.003a leakage="" current="">100000-hour Lifespan 360° Transmission angle