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Its not ooo for people like you that use iron. Iron, borehole and other energy consuming installations cant pay the price.

my friends told me it's a better alternative. At least you don't pay for light you didn't use.

Yes in terms of paying for energy, its a great because you wont pay for what you didnt use. But my point is for heavy appliance users, the estimated is perfect because you pay less compared to the energy consumed.