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Cost Calculator
This page allows you to calculate the cost, both economically and environmentally, of your outdoor lighting.
Requires Javascript to be enabled
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Input parameters | |
| Select a typical setting: |
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| Or type in your own values... | |
| Number of lights: |
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| Number of hours your lights are on per day: |
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| Cost of electricity (pence per kW hr): |
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| Bulb power rating (Watts): |
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Output parameters | |
» Energy used per year (kWh):
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» Energy used per week (kWh):
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» Cost per year (£):
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» CO2 pollution generated per year (kg):
(We use DEFRA's average figure of 0.43 kg of CO2 per kWh in the UK; This is a mix of coal, gas, nuclear and renewables. e.g. Coal power stations produce 0.9kg/kWh, renewables produce no CO2 emission) |
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Comparisons | |
» Equivalent minimum number of energy efficient bulbs:
(most applications, both business and at home, require a maximum of a 50W bulb, if not less e.g. The Glarebuster)
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» Equivalent CO2 pollution in car miles travelled:
(assuming 150g CO2 is produced per km; ref. Society of Motor Manufacturers and Traders Limited)
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» Equivalent CO2 pollution in aircraft miles:
(assuming 170g CO2 per km; ref. BBC News)
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» Equivalent hours a television is used per week:
(assuming a 100W TV)
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» Equivalent number of televisions on standby all week:
(if a TV uses 10W when in standby, it will use 1.68kWhr per week)
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» Equivalent hours a desktop PC is on per week:
(assuming a desktop PC uses 100W, and its monitor uses 100W)
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» Equivalent energy usage in cups of tea/coffee per day:
(assuming a 3000W kettle boils 1.5 litres of water for 6 cups of tea in 3 minutes)
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» Equivalent number of washing machine cycles per week:
(assuming a washing machine uses 1.15kWh per cycle)
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» Equivalent number of tumble drying cycles per week:
(assuming a dryer uses 4.5kWh per cycle)
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