Like the incandescent bulbs commonly used in panel mount applications, LEDtronics' RPLH Series LED lamps feature T3¼ (9mm) single-contact miniature bayonet bases that give installation a familiar twist. RPLH Series LED lamp assemblies are rated for 130VDC/120VAC input - 50Volts DC minimum. They directly replace 28MB, 313, 757, 1819MB series incandescent bulbs.