Disclosed is a light tower which includes a mast made of an upwardly-elongated flexible and transparent airtight shell. The mast has an upper and a lower section. The lower section is hermetically fitted onto a bottom flange which has an air vent for inflating the shell with air. The light tower includes at least one electric lamp located and fastened within the shell; a stand connected to the bottom flange; a motor-driven air pump connected to the air vent; and means for supplying electricity from a power source to the electric lamp. The light tower is characterized in that the motor-driven air pump, a control unit of the light tower, and the means for supplying electricity are all mounted on the bottom flange outside the shell. The light tower further includes a retractor for rapidly pulling in the upper section of the shell. The retractor is fitted onto an outside portion of the upper section of the mast shell.
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