These 3 mm blue LED diode lights deliver bright blue illumination through transparent lenses. They are suitable as indicator lights for electronic components, PCB circuits, and DIY bulb lamp projects that require reliable light emitting diodes. Light color: Blue Forward voltage rating: 3.03.2 V Head size: 3.6 x 5.08 mm; Pitch: 2.54 mm Total length: 23.5 mm Packing: 100 x Blue LED Diode Lights These energy efficient LEDs deliver strong brightness with low power consumption. They feature universal 2.54 mm spacing for broad compatibility and come in a bulk 100 piece value pack. Wiring guidance: Insert the longer anode lead (+) to the positive voltage (3.03.2 V) and the shorter cathode lead () to ground through a current limiting resistor. Notes Ensure proper polarity when wiring the LED. Use an appropriate current limiting resistor to prevent damage.