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 Compact fluorescent light 11 watts Save 80%
Halogen 20 watts downlight versus LED light 8 watts Save 60%
Halogen 50 watts downlight versus GU10 Compact fluorescent light 11 watts (fitting replacement) Save 78%
Fluorescent lamp with magnetic ballast 36 watts versus Fluorescent lamp with electronic ballast 24 watts (retrofit) Save 33%
Par 38 Floodlight 125 watts versus Par 38 Floodlight Compact fluorescent light 23 watts Save 82%
Halogen striplight 500 watts versus Halogen Xenon striplight 400 watts Save 20%

Energy Efficient Lighting Options

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 0.15
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 50000 hrs, Electronic Ballast Fluorescent 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 Articles , Energy Calculators , Efficiency Quiz's , 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 Efficiency Articles , Energy Calculators , Efficiency Quiz's , Efficiency eBook

Group Light Energy Calculator Results

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?

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