Berkoh

Understand your light bill.

Light bills are common, so it makes sense to understand how they work.


A label on an installed LED bulb: FOCUS(R) <star symbol with the number 5 inside> FS15B 15W 50/60Hz 170-270V-LED 6400K.
15W, so this light bulb uses 0.015 units per hour when switched on.


Here's a simplified model of residential light bills:


A cycle lasts from the beginning of a month to the end of a month. For example, if it is March 2025 now, the price of a unit will reset on April 2025.

There is a monthly fee of
2.132.13
So, there's a spending of GHS2.13 to get 0 units.

A maximum of 30 units could be bought for a price of GHS0.71031975 each before you will have to upgrade your account.

So, when 30 units are bought at a price of GHS0.71031975 each,
2.13+(30×0.71031975)=23.43959252.13 \\+\,(30 \times 0.71031975)\\ = 23.4395925
So, there's a spending of GHS23.4395925 to get 30 units.

To buy more units, you will have to upgrade your account from Lifeline to Other for the month, for a fee of GHS35.570808.
2.13+(30×0.71031975)+35.570808=59.0104002.13 \\+\,(30 \times 0.71031975) \\+\,35.570808\\ = 59.010400
So, there's a spending of GHS59.0104005 to get 30 units, if an account with 30 units were to somehow be upgraded anyway.

After buying 30 units, a maximum of 270 units can be bought for GHS1.60931715 each. For example, if 300 units are bought,
2.13+(30×0.71031975)+35.570808+(270×1.60931715)=493.5260312.13 \\ +\,(30 \times 0.71031975) \\ +\,35.570808 \\ +\,(270 \times 1.60931715)\\ = 493.526031
So, there's a spending of GHS493.526031 to get 300 units.

If you need any more units, each unit will be sold at a price of GHS2.1264495 each.

It is possible to buy 0.1 units.


From May 3rd, 2025 on,


there will be a monthly fee of
2.132.13
So, there's a spending of GHS2.13 to get 0 units.

A maximum of 30 units could be bought for a price of GHS0.8150877 each before you will have to upgrade your account.

So, when 30 units are bought at a price of GHS0.8150877 each,
2.13+(30×0.8150877)=26.5826312.13 \\ +\,(30 \times 0.8150877)\\ = 26.582631
So, there's a spending of GHS26.582631 to get 30 units.

To buy more units, you will have to upgrade your account from Lifeline to Other for the month, for a fee of GHS39.5486595.
2.13+(30×0.8150877)+39.5486595=66.13129052.13 \\ +\,(30 \times 0.8150877) \\ +\,39.5486595\\ = 66.1312905
So, there's a spending of GHS66.1312905 to get 30 units, if an account with 30 units were to somehow be upgraded anyway.

After buying 30 units, a maximum of 270 units can be bought for GHS1.84668015 each. For example, if 300 units are bought,
2.13+(30×0.8150877)+39.5486595+(270×1.84668015)=564.7349312.13 \\ +\,(30 \times 0.8150877) \\ +\,39.5486595 \\ +\,(270 \times 1.84668015)\\ = 564.734931
So, there's a spending of GHS564.734931 to get 300 units.

If you need any more units, each unit will be sold at a price of GHS2.4400866 each.

It is possible to buy 0.1 units.





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