Device with a light signalling function

A device with a light signaling function designed to emit a light signal outwards with a color included in a standard color space, said device comprising:

• a light-emitting diode designed to emit a first light signal in a first wavelength range in blue or ultraviolet;
• a conversion element configured to convert said first light signal emitted by the light-emitting diode in said first wavelength range into a second light signal in a second wavelength range;
• a cap arranged to select a more restricted wavelength range than a wavelength range of the standard color space, the more restricted wavelength range being within the second wavelength range which is more extended than the wavelength range of the standard color space and to output the light signal having a third wavelength corresponding to the color included in said standard color space,
• wherein:
• the conversion element is further configured so that said second wavelength range includes the entirety of said standard color space, and
• wherein the conversion element is an element with a phosphor function inserted between the light-emitting diode and the cap.