How does LED lighting reduce CO2 emissions and save money?

Reduced CO2 emissions

Traditional lights consume far more energy than LED lights.

This is because LEDs have a high lumen output per watt, turning about 95% of their energy into light, whereas traditional lights waste lots of energy turning it into heat.

Let’s look at the following scenario:

  • Retail store trading 12 hours per day, 365 days per year
  • Currently operating 180 luminaires with dichroic lamps

As you can see in the table below, the LED luminaires only use 6 watts of energy, whereas the existing dichroic lamps use 50 watts.

By installing LED lights, the energy saving per year for this store is 88%

Existing dichroic lamps
Power consumed per luminaire (watts) Qty of fittings Total power consumed per year (KWH)
50 180 39312
LED luminaires
Power consumed per luminaire (watts) Qty of fittings Total power consumed per year (KWH)
6 180 4717.44
Energy saving (KWH) 34594.56
Percentage saving 88%
Money savings

Because LED luminaires consume far less energy than traditional lights, it is much less expensive to run LED lights.

The table below shows how the same retail store saves £6,227.02 per year by replacing the existing dichroic lamps with LED luminaires (based on per unit cost of electricity at 0.18p)

Existing dichroic lamps
Power consumed per luminaire (watts) Qty of fittings Total power consumed per year Cost per year
50 180 39312 £7,076.16
LED luminaires
Power consumed per luminaire (watts) Qty of fittings Total power consumed per year Cost per year
6 180 4717.44 £849.14
Cost saving 34594.56 £6,227.02

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