We have all used IB (Incandescent bulbs) and the earth now asks us to switch to CFL (Compact Fluorescent lamps). 
So what do we gain and what do we lose?
First and foremost, CFL saves a lot of energy compared to IB. CFLs use about a quarter of the power of incandescent bulbs
● 7-9watt CFL Equivalent to 40watt incandescent bulb 
● 11-15watt CFL Equivalent to 60watt incandescent bulb 
● 18-20watt CFL Equivalent to 75watt incandescent bulb 
● 23-25watt CFL Equivalent to 100watt incandescent bulb
When you switch over to a CFL make sure you replace your existing IB with an equivalent CFL, so that you don't lose on the lighting. 
Carbon footprint:
Assuming that the average coal or oil fired power plant releases around 1kg of CO2 per kilowatt, this bulb could reduce our CO2 emissions by around 300 kg (660lbs) per year. Over the rated life of the CFL, which is 10,000 hours, it could reduce our CO2 production by around 1180 kg (2,600 lbs). 
So let's do our part in saving for our future generations.
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