HERE'S EVEN further proof of compact fluorescent lamps (CFLs) being more cost-effective than the incandescent bulbs.
The upfront cost of a 100-watt incandescent bulb may cost you $100, while a 25-watt CFL may cost you $300 up front, but in a year, the CFL is what will save you more. Here is your proof:
If we assume that the 100-watt incandescent operates for 1,820 hours per year, which is 7 hours x 5 days x 52 weeks, then the power used by one bulb in one year would be 1,820 x 100 = 182 kWh per year.
Assuming $9.69 as the rate for residential consumers, the total money spent for the year would be 182 kWh/year x $9.69, which equals $1,763.58 per year. On the other hand, since a CFL has an efficiency level of 75 per cent, then savings on an annual basis would amount to $1,763.58 x 0.75, which equals $1,322.69 per year.
Therefore, the amount spent on CFL use equals $1,763.58 - $1,322.69 = $440.89 per year. Hence, while the first price tag shows that you are paying $100 for an incandescent bulb and $300 for a CFL, at the end of each year, the CFL is the one that would have saved you more, and cost you less, which is the second price tag.
So now that you know, what are you going to do about it? Start saving today, go the energy-efficient way.
- K.C.-D.
