Contrary to what usually happens, the light was not that of a stage but the illumination of a wall of the hall with ultraviolet light (black light as it is usually known).
To achieve this we illuminated from the floor with LED bars attached to the same wall, and with flying light projectors, also LED, for the upper part of the wall where the bars could not reach.
The reason for the ultraviolet light and not a “conventional” one is because the dynamics of the event required to highlight a series of handprints and signatures with messages made with fluorescent paint and this black light can greatly highlight this type of fluorescence.