Kingbright Through Hole Resistor LED Series The resistor LED lamps, from Kingbright, are available in 3mm and 5mm package options. The LEDs have an integral current limiting resistor. The resistor LEDs do not require an external current limiter with 12 volt supply. This allows the resistor LEDs to be a cost effective solution, saving valuable space and eliminating the additional cost for a resistor. There are a variety of colour options available in the resistor range, with a wide viewing angle of 60°.