In order to integrate in all environments a control electronics ensures the rest of the lamp when it is supported too often on his hat. Indeed: the pneumatic system which ensures the maintenance of the lamp off the ground allows a slight support on his hat because the whole remains flexible, which amuses the children, also to avoid that it becomes a game, the lamp s’ andeind and retracts into the ground at the fourth attempt to sink the hat. Lucie will turn on automatically 15 minutes after.