Red LEDs are one of the most popular colour choices for LEDs and are used in a wide range of applications. They emit a light with a wavelength that is red in colour and goes from approximately 610-760nm on the dominant wavelength scale. This value, given in ‘nm' stands for nanometres.
Red LEDs are often use to attract attention, such as warning indicators in control panels, PCBs or in traffic lights. They are available in both surface mount (SMD) and through-hole packages with various output intensities. Red LEDs can come with a clear or tinted lens too.