Saving Electricity
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Example Cost Savings - Lighting
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Lighting
Standard light used an average of 4hrs/day on Normal Rate electricity
over 2 years: |
Standard 100W Bulb (replaced 3 times @ 25p) costs around
£ 33
20W Low Energy Bulb (replaced once @ £2.50) costs around
£9 |
Standard light used an average of 8hrs/day on Normal
Rate plus 2hrs/day on Cheap Rate electricity over 1 year:
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Standard 40W Bulb (replaced 4 times @ 25p) costs around
£ 15
9W Low Energy Bulb (replaced once @ £2.50) costs around
£6 |
Standard light used an average of 2hrs/day on Normal Rate electricity
over 1 year: |
Standard 60W Bulb (replaced once @ 25p) costs around £
5
11W Low Energy Bulb (replaced once @ £2.50) costs just
over £3 |
Halogen light used an average of 4 hrs/day on Normal rate electricity over 2 years. |
Standard 20W Halogen Bulb (replaced once at £2) costs around £9
LED 2W Replacement Bulb (not replaced) costs around £0.70 |
Lighting Control
2 150W outside lights on for 0.5hrs/day each
controlled by PIR detectors with standby power of 7W each
over 3 years |
Powered continuously costs around £52
Powered via time switch (1W power) costing £8 costs
around £45 |
The figures for these examples were calculated using EnCalcE
, an electrical saving calculator which is free to download for
personal use. Examples assume: Standard rate electricity (18hrs/day)
= 11.046p/KW Hr, Cheap rate electricity (6hrs/day) = 4.975p/KW
Hr (the normal rate is the lower secondary rate, both figures
include VAT at 5%), No discounts are included.
To check your electricity bill or predict how much electricity you are likely to use
try using EnCalcEU, an electricity use and cost calculator.
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