Check the listing for details. 50pcs 3mm LED Diode Lights, Blue Light DC 12V for Electronics. Condition: New. Listed at 16.22 USD. These 3mm blue LED diode lights feature bright blue illumination through transparent lenses, perfect as indicator lights for electronic components, PCB circuits, and DIY bulb lamp projects requiring reliable light emitting diodes.These energy-efficient LEDs deliver superior brightness with low power consumption. The 7-core structure enhances the bendability of the wire, avoids frequent bending and breakage, extends its service life, and the copper cores improve current transmission efficiency.Connect the blue wire to positive polarity and the black wire to negative polarity.Always observe correct polarity; unsuitable for wet environments; reverse connection may damage components.Specification:Light Color: blue Rating Voltage: 12VCurrent: 20mALight Bead Size: 3mm x 5.08mm/0.12 inch x 0.2 inch(D*H)Wire Length: 185mm/7.