Self-contained battery-based illumination system consisting of an ergonomic backpack in a semi-rigid shell containing a lithium battery providing autonomy to the 4-hour lightening balloon and its telescopic mast. Supplied with external battery charger (230V AC power supply). Set weighing less than 5kg. And can also be placed on the ground. An envelope Diamond shape Ø 40cm with discharge bulb 50W. Illuminated area around 300m²