How they work 1. Place "Prudent Lights" in your tree, nativity scene or space you want to light up. 2. Plug them into any socket. 3. And that's it. They’ll know when to switch off to save. The "Prudent Lights" are presented in a humorous spot that narrates the surprise party that a family is preparing for their grandmother, Prudent. To amaze the head of the family, her children and grandchildren decorate her entire home with flashy lights that require a lot of power, achieving their objective, but not with the desired effect.
Problem
This Christmas in Spain, moderation with food, restraint when it comes to drinking, and control in family conversations, will be minor concerns compared to the real challenge: exorbitant electricity prices.