What does 660nm Red light do? The color of 660nm LED is a reed red color, which make it looks redder than common 635nm LED or 625nm LED. It's report that 660nm wavelength can make the better skin health and collagen production when we use it as red light therapy. And when we use it in the LED grow light for plant, this wavelength will encourage plant growth, especially the high, extended leaves and flowers. 2016FRC66P1L14 is a small size of Red SMD LED that can handle 60mA operation current and provide brightness at range of 800-1500mcd. Which is good for LED grow light application or infrared red LED therapy. If you looking for some SMD LED with 660nm wavelength. Just feel free to contact us for more detail about that. Electrical Parameters: Parameter Symbol Min Type Max Unit …