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Bright Light: 1. These LED diodes emit a bright light, with high reliability and low heat produced. High-efficiency round light bulb. How to Use: With prepared wire and a resistor, these LED light emitting diodes are ready to use right out of the box. Instruction: It is easy to use. Just connect the wire to the power supply and it will work. Application: These light emitting diodes can be used for a variety of projects, including decoration lighting, RC indicator lighting, illuminating keyboards, musical birthday card, science experiments, and miniature parts replacement. Note: Please note that the red wire is for the positive pole and the black wire is for the negative pole.