Although it attracts positive charges, the electrode is actually negatively charged. Simply put, every LED has an anode and a cathode and when the current flows unidirectionally through it, light is emitted as a result.Ī cathode attracts a positive charge, also known as a cation. Electricity enters through the positive side (anode) and exists through the negative side (cathode). On the contrary, the negative terminals are referred to as cathodes. With LEDs, these positive terminals are referred to as anodes. In general, which way is the current entering and where is it exiting? What are Anodes and Cathodes?Įvery electrical component requires positive and negative terminals in order to complete a circuit. Since this is the case, it’s crucial to know and understand the direction that it’s moving. As we discussed earlier, with LEDs, electrical current flows in one-direction. When polarity is referred to in regards to LEDs, it’s related to the flow of electricity. Most LEDs are rated for a 50,000 hour lifespan whereas fluorescent or incandescent lighting is lucky to get near 10,000 hours. Lifespan – Although LEDs may initially cost a bit more, they’ll always outlast other light sources.This is a major benefit when directly compared to incandescent lighting where over 90% of their energy is released through heat.
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