Question

To make drawing save a Walt to save a lot

Answer 1

Perhaps this idea will be good.
Show LED and write caption along with some coins or notes..
      Caption:   As LED or CFL FITS,  You Save LOTS.
see the picture enclosed.
====There could be a house with roofing fitted with solar panels. They generated current for the house and also give surplus to the electric grid (network).
caption :    I use only a Watt,   I give a Lot.

Answer 2

See the given pictures.