Energy Efficient Lighting
Every business uses lights and for some businesses lighting can account for up to 50% of their total energy use.
Massive lighting energy cost savings are available when upgrading to new LED technology. These cost savings can be as high as 82%. Upgrading can be accomplished with no additional capital outlay because the cost of the new lights is covered by the savings in energy costs. In most cases the upgrade will be cashflow positive from day 1.
As well as saving money through reduced energy consumption, energy efficient lighting:
- Will require no or less maintenance
- Provides a better quality of light and hence an improvement in productivity and worker safety
- Significantly reduces heat output often reducing air conditioning costs
How Are Cost Savings Calculated?
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Cost Savings Calculator
Case Study-Common Office Lighting
The most common lighting used in Australian offices is twin recessed 36W T8 fluorescent troffer lights. The total energy consumption of this fitting is a combination of the wattages of the tubes plus the amount of energy used by the transformer/ballast fitted. This is known as “connected load”. On average, older transformers/ballasts can consume up to the same amount of energy as a single 36W tube.
In this case study we will replace the fluorescent troffer with a single LED Panel Light rated at 32W. This panel includes an integrated electronic ballast that is 95%+ efficient therefore adding almost nothing to the energy usage. This panel produces a higher level of luminocity than the fluorescent troffer and is available in 3 different colour temperatures to suit different lighting requirements.
This method reduces energy use by replacing two 36 W T8 lamps with a connected load of approximately 88 W with a complete new fitting with a connected load of 32W, (saving 56 W). A 64% SAVING IN ENERGY COSTS!
It is common for most offices to have hundreds of older fluorescent troffer lights. If we use an example where an office has 100 fluorescent troffer lights we can calculate the before and after benefits of upgrading to LED lighting technology.
Based on an energy cost of $0.26c per KW/h, in an office operating for 12 hours per day, 6 days per week.
Each troffer cost $ 86 per year to run. 100 troffers cost $8,600 per year to run. We can also add costs for maintenance but in this example we will leave it out for simplicities sake.
If we replace a troffer using 88W with an LED Panel light using 32W we reduce the cost per light from $86 per year to $32 per year.
In an office with 100 troffers the overall cost saving is $5,400 per year or $54,000 over 10 years.
These and other energy saving calculations can be verified by viewing NSW State Government Energy Efficient Lighting Technology Reports at www.environment.nsw.gov.au