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Interactive Energy Calculator
Estimate how much you could be saving by changing the type of lamp you use. The wattages do not include gear wattages (e.g. Tube or Bulb)
STEPS
Be careful to use the correct units
hours, days, Watts, pence
Existing Lamp Type
Proposed Lamp Type
1
Total time that lamp is used per day
(hours)
(hours)
2
Number of days lamps on per year
(days)
(days)
3
Lamp power rating - this will be printed on the lamp
(Watts)
(Watts)
4
Cost per kWh - this will be stated on your electricity bill
(pence)
(pence)
5
Cost of lamp
(pence)
(pence)
6
Lifespan of lamp - you may find this stated on the lamp's packaging
(hours)
(hours)
7
Existing Lamp Type
Proposed Lamp Type
8
RESULTS
Total cost per year (accounting for electricity consumed & how long the lamp lasts)
pence per year
pence per year
Total savings through proposed lighting system
pence per year
Estimate
how much you could be saving by changing the type of
lamp you use. The wattages do not include gear wattages
(e.g. Tube or Bulb)