When an LED (Light Emitting Diode) emits light, which means the SMD LED or LED Lamps. It does so across a range of wavelengths, not just one specific wavelength. The color of the light emitted by an LED is determined by the dominant wavelength within that range.For example, a red LED will have a dominant wavelength in the range of 620-750 nanometers, while a blue LED will have a dominant wavelength in the range of 430-480 nanometers.LEDs are often used in combination with phosphors to produce white light. When white light is produced using a combination of red, green, and blue LEDs, the resulting light will have a dominant wavelength that is a mix of all three colors.In summary, different wavelengths in the same LED package can be produced by using different materials for the LED and/or by combining multiple LEDs with different dominant wavelengths.
A single 5050 SMD LED can have different wavelengths of light depending on the materials used in its construction. For example, a 5050 LED can be made with a blue phosphor coating to produce a blue-colored light, or it can be made with a red or green phosphor coating to produce a red or green-colored light, respectively. The specific wavelength of light emitted by a 5050 LED will depend on the combination of materials used in its construction.