Light-Emitting Diodes (LEDs) are optoelectronic devices that operate to emit light at frequencies of the ultraviolet (UV), visible (VIS) and infrared (IR) electromagnetic radiation spectrum. However, the negative impacts on visual health due to the use of LED-based elements used for lighting, are a matter of attention, which should be investigated through their radiometric, photometric and colorimetric properties in order to guarantee their proper use and verify characteristics of these light sources such as: spectral and spatial distribution of light intensity and irradiance. According to the above, this work presents the development of a protocol prototype for the metrological assurance of a bench for radiometry of LED sources in the visible and near ultraviolet spectrum, following the recommendations and methods of the National Metrology Center of Mexico. (CENAM). Therefore, the measurement of the pattern of the spectral and spatial distribution of irradiance was carried out on test LEDs of interest. For this measurement, an optical bench was implemented, from an arrangement based on a monochromator, a photomultiplier tube, a lock-in amplifier, a positioning system with goniometers, a regulated voltage source, a supervision and electronic system, positioned on an anti-vibration table.