Calculations for Energy savings based on an average of different sources:

- Energy cost per KWH (March 2006, Entergy New Orleans) $0.118
- one 15w light bulb used 24hrs/day for one year (8760 hrs) saves $46 (394.2 KWH)(source: Entergy New Orleans lighting calculator

- Most 15w light bulb last 10'000 hrs. (savings: $53 = 450 KWH )

Calculations for CO2 emission reduction:

EPA recommends to use the value for the subgrid from the eGRID database. The value for the SERC Mississippi Valley subregion (our region) from the latest eGRID data (for the year 2004) is 1135 lb/MWh (1 MW = 1000 kW), which is equivalent to 0.515 kg CO2/kWh, the most widely used measure.

394 KWH = 447lb CO2

Our main focus is environmental. The savings posted on sections of this web site are on purpose a low estimate. The savings might be higher than stated on the web site. Thank you for your support!

1 CFL = savings of KWH394  = $46 = 447 lb of CO2

The international reporting standard for CO2 emissions is in metric tons. Since there are 2204.62 lbs per metric tonne, a single ton of carbon dioxide equates to 2204.62 pounds of CO2.