Hey look what i have found:
DIY modify accessories of 12v camp light
Use it at 240V through a transformer
As we always need a power supplement by using the mains electricity of the caravan parks. But most illumination equipments are 12V DC which is primary designed for vehicle battery application. If we stay more longer then our caravans need to use connect the lights to the external mains panel for battery electricity saving consideration.So with this information we can easily work out about saving power resource. How it works? Check out. It really works and pretty easy to modify them.