Saving Electricity
|
 |
Example Cost Savings - Lighting
|
Lighting
Standard light used an average of 4hrs/day on Normal Rate electricity
over 2 years: |
Standard 100W Bulb (replaced 3 times at 25p) costs around
£27
20W Low Energy Bulb (replaced once at £2.50) costs around
£8 |
Standard light used an average of 8hrs/day on Normal
Rate plus 2hrs/day on Cheap Rate electricity over 1 year:
|
Standard 40W Bulb (replaced 4 times at 25p) costs around
£ 16
9W Low Energy Bulb (replaced once at £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 at 25p) costs around £
5
11W Low Energy Bulb (replaced once at £2.50) costs just
over £3.50 |
Halogen light used an average of 4 hrs/day on Normal rate electricity over 2 years. |
Standard 35W Halogen Bulb (replaced once at £2) costs around £18
LED 2.8W Replacement Bulb (not replaced) costs around £8 |
Halogen light used an average of 4 hrs/day on Normal rate electricity over 3 years. |
Standard 50W Halogen Bulb (replaced once at £2) costs around £36
LED 3.7W Replacement Bulb (not replaced) costs around £14 |
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 - off for 12 hours a day) 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. if you are on a single rate tariif the savings will be greater. Inflation was assumed to be 5%/year which is probably and understaement
To check your electricity bill or predict how much electricity you are likely to use
try using EnCalcEU, an electricity use and cost calculator.
|
