The applications of LEDs are diverse
- Devices, medical applications, clothing, toys
- Remote controls, such as for TVs and VCRs, often use infrared LEDs.
- Glowlights, as a more expensive but longer lasting and reusable alternative to Glowsticks.
- Movement sensors, for example in optical computer mice
- The Nintendo Wii's sensor bar uses infrared LEDs.
- In optical fiber and Free Space Optics communications.
- Toys and recreational sporting goods, such as the Flashflight
- Lumalive, a photonic textile
- In pulse oximeters for measuring oxygen saturation
- LED phototherapy for acne using blue or red LEDs has been proven to significantly reduce acne over a three-month period.
- Some flatbed scanners use an array of red, green, and blue LEDs rather than the typical cold-cathode fluorescent lamp as the light source.
- Some custom computers feature LED accent lighting to draw attention to a given component. Many computer manufacturers use LEDs to tell the user its current state.
- Sterilization of water and other substances using UV light.
- LED light activation allows drugs to destroy cancer cells, leaving surrounding tissue virtually untouched. Offering substantial improvement over lasers, a LED probe produces longer-wavelength, broad-spectrum, near-infrared light, enabling both deeper and wider penetrations.