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Light Energy Calculator

Your choice of lighting is an easy method to reduce energy consumption and save you money.
Calculate how much in light energy savings you missing out on? Find the answers here.
Enter your lighting use and see what an energy efficient equivalent can save in running costs.
Individual calculations can be imported into the Group Results.
Added benefits include less bulb replacement labour and less heat output which reduces air conditioning running costs.
Consider timers to further control your lighting hours.

Sample regular light versus energy efficient light

Incandescent light bulb 60 watts versus LED bulb 9 watts Save 85%
Halogen 35 watts downlight versus LED light 8 watts Save 78%
Halogen 50 watts downlight versus GU10 Compact fluorescent light 11 watts (fitting replacement) Save 78%
Fluorescent tube lamp 38 watts versus LED tube 20 watt lamp with LED Starter Save 48%
Par 38 Floodlight 125 watts versus Par 38 Floodlight LED 13 watts Save 89%
Halogen striplight 500 watts versus 80 watt LED floodlight fitting Save 84%

Energy Efficient Lighting Options

LED lights are available in 3,5,6,9,10,12, 14, 16, 18,20,22, 50, 80, 100, 200, 240 watts.
Compact fluorescent lights are available in 5, 7, 9, 11, 15, 20, 24, 30 watts.
LED MR16 downlights are available in 3, 4, 5, 6, 8 watts.
Halogen striplight are available in 60, 100, 150, 230, 300, 400, 500, 1000, 1500, 2000 watts.
Choose lights to suit your requirements and give you energy savings.

How much in lighting energy can you save?

Fill in the top table with values of your existing lighting, proposed lighting and its use. Then click Get Results button to see your savings over time.

Power Cost in Dollars per kWh example 0.28


Number of lights in the circuit (1-100)


Lighting hours per day in use (1-24)


Days per week lighting in use (1-7)


Power Consumption of Original light in Watts (1-200). Choose from list or select your own value.


Cost of original light in Dollars (1-100)


Lifespan of original light in hours (1000-100000).
E.g. Incandescent 1000 hrs, Halogen 1000 hrs, Magnetic Ballast Fluorescent 15000 hrs.


Power Consumption of Proposed light in Watts (1-200). Choose from list or select your own value.


Cost of new light in Dollars (1-200)


Lifespan of new light in hours (1000-100000)
E.g. CFL 10000 hrs, LED 30000 hrs, LED tube 30000 hrs, Halogen Xenon 2000 hrs.



Press button after completing or adjusting fields in the top table

Local links: Matthew Homepage , Outdoor Solar Lighting Articles , Energy Efficiency Calculators , Efficiency eBook

Single Light Energy Calculator Results

Calculator Parameter Old Light Result New Light Result

Power consumption per year (kWh)



Electricity cost per year ($)



Total cost after 1 year ($)



Total cost after 2 years ($)



Total cost after 3 years ($)



Local links: Matthewb Homepage , Outdoor Solar Lighting Article , Energy Calculators , Efficiency eBook

Group Light Energy Calculator Results

lighting power changing up and down

Run individual calculations using the above calculator.
Press a Import(1-10) button to move calculations to this table.
Type in Your Light Description of the light/s. E.g.Room name or light switch group. Note the grand totals.
Calculate how much light energy you could save? Print your lighting energy saving plan.
Would solar lighting be a more suitable alternative?
Where else can I make light energy savings? Research and calculate your options. Work out what changes will have the most benefits.

Import
Result		 Your Light
Description		 New Light
Costs		 Energy kWh
3 yr savings		 Money ($)
3 yr savings
Grand Totals

Are these light energy savings worthwhile?

Export Group Light Energy Calculator Results

Email or save your results. Click Export Light Group Results button.
Copy text area and save as .CSV file using Notepad or equivalent text editor.
Email results as is for reading or saving as CSV at the email destination.