Question

Explain how a $10.00 compact fluorescent light bulb (15 W) can be an overall money saver compared to an incandescent light bulb (60 W) that costs $0.50.

Answer 1

Step-by-step explanation:

We would consider the kilowatt hour for both bulbs. It is the energy consumed by an appliance per hour.

Recall, 1 kw = 1000w

15w = 15/1000 = 0.015 kw

60w = 60/1000 = 0.06kw

In 1 hour,

1)

The 15 W bulb would consume 0.015 kw.

For 10 hours per day, the consumption is 0.015 x 10 = 0.15kw

For a month of 30 days, the consumption is 0.15 x 30 = 4.5

Let's assume that the charge per KW is $0.2

Consumption cost per month = 0.2 x 4.5 = $0.9 per month

2)

The 60 W bulb would consume 0.06 kw.

For 10 hours per day, the consumption is 0.06 x 10 = 0.6kw

For a month of 30 days, the consumption is 0.6 x 30 = 18

Let's assume that the charge per KW is $0.2

Consumption cost per month = 0.2 x 18 = $3.6 per month

Thus, the 15W bulb would be an overall money saver as time goes on.