Abstract: A movable device for exposing to light with a view to eliminating pathogens has a first module for emitting light pulses that includes a panel for treating with light and has a second module for adjusting the optical power density of the treating panel and a means of locomotion allowing the device to be moved. The optical power density of the light panel allows a radiation dose between 250 J/m2 and 2000 J/m2 to be applied to the surface of plant matter. The light pulses delivered to the plant matter have identical or different wavelengths between 200 nm and 750 nm (UV-C, UV-B, UV-A, visible light) and the exposure times are shorter than or equal to four seconds.

Abstract: A mobile light exposure device that delivers light pulses to a plant material has a first emission module that has at least one light treatment panel configured to emit one or more light pulses; has a second module configured for adjusting and/or switching on an optical power density of the light treatment panel and optionally a temperature of the light treatment panel; and has a locomotive means for moving the mobile light exposure device. In operation, the mobile light exposure device attenuates impacts on plant material associated with abiotic stresses, such as stresses associated with edaphic, climatic and/or chemical factors.

Abstract: A mobile light exposure device or improving the yield and quality of biological material has a first module for emitting one or more light pulses, which includes a light treatment panel whose surface area is between 0.01 m2 and 10 m2, a second module or adjusting the optical power density of the treatment panel and optionally adjusting the temperature of the panel, and a means of locomotion for moving the device at a speed of between 1 and 10 km/h. The optical power density of the panel is between 100 W/m2 and 10,000 W/m2, preferably between 300 W/m2 and 3,000 W/m2, and the light pulses delivered to the biological material are of identical or different wavelengths and of durations less than or equal to two seconds.