Cfl Vs. Incandescent Cost Comparison Worksheet

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NAME ___________________________________________________________
CFL vs. Incandescent Cost Comparison: Part 2
Bulb
Incandescent
Compact
“Why should I change my light bulbs to CFL’s?
^ƉĞĐ ŝĮ Đ ĂƟŽŶƐ
Fluorescent (CFL)
dŚĂƚ ŝƐ Ă ŐƌĞĂƚ ƋƵĞƐƟŽŶ͊   dŽ ŐĞƚ ƚŚĞ ĂŶƐǁ Ğƌ͕  ǁ Ğ
Light Output (lumens)
780 lumens
900 lumens
need to look at the life cycle cost for light bulbs.
Life Expectancy (hours)
2,000 hours
12,000 hours
What is the life cycle cost? The life cycle cost is
ŶĞƌŐLJ  h ƐĞĚ ;ǁ ĂƩ ƐͿ
ϲϬ ǁ ĂƩ Ɛ
ϭϯ  ǁ ĂƩ Ɛ
ƚŚĞ ŝŶŝƟĂů  Đ ŽƐƚ ŽĨ ƚŚĞ ĂƉƉů ŝĂŶĐ Ğ ;ŝŶ ŽƵƌ Đ ĂƐĞ Ă ů ŝŐŚƚ
bulb) AND the cost of energy needed to use the
Cost per Bulb (dollars)
$.50
$2.00
appliance over its life.
Number of Bulbs
6
1
needed for 12,000
/ŶŝƟĂů  Đ ŽƐƚ ŽĨ ů ŝŐŚƚ ďƵů ď н ŶĞƌŐLJ  Đ ŽƐƚƐ ;Ğů ĞĐ ƚƌŝĐ ŝƚLJ Ϳ 
hours of light
= Life Cycle Cost of light bulb
Cost of Light Bulbs for
$3.00
$2.00
Use the chart at the right to complete the
12,000 hours of light
(circle 1)
(circle 3)
ĞƋƵĂƟŽŶƐ ďĞů Žǁ  ƚŽ ĚĞƚĞƌŵŝŶĞ ǁ ŚŝĐ Ś ů ŝŐŚƚ ďƵů ď
Cost of Electricity for
$79.00
$17.00
has the lowest life cycle cost and the greatest
12,000 hours of light
(circle 2)
(circle 4)
savings.
Use the table above to complete the chart.
Circle #1
Circle #2
Square #1
+
=
Cost of Incandescent Bulbs
Incandescent Life Cycle Cost
Cost of Electricity
Square #2
Circle #4
Circle #3
+
=
Cost of Electricity
CFL Life Cycle Cost
Cost of CFL Bulbs
Amount from Square #1
Amount from Square #2
=
Life Cycle Savings for
Incandescent Life Cycle Cost
CFL Life Cycle Cost
replacing one IL with a CFL

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