Question

To save a Walt to save s 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.

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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.