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Compact Fluorescent Savings Calculator

Update any field(s) to calculate your savings.

Existing incandescent light bulb size	25 40 60 75 100 150 watts
Replacement ENERGY STAR® compact fluorescent bulb size	9 13 20 23 34 50 watts
Number of light bulbs	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 bulbs
Hours of use per day	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 hours
Cost per incandescent light bulb	0 1 2 3 4 5 6 7 8 9 10 . 00 25 50 75 dollars
Cost per ENERGY STAR® compact fluorescent bulb	0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 . 00 25 50 75 dollars
Electricity cost	0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 . 0 1 2 3 4 5 6 7 8 9 cents per KWH

Your approximate savings and return on investment are: Estimated energy savings per year   kilowatt hours Estimated savings per year $ Estimated ENERGY STAR® ROI   months Savings are for wattages shown. Your actual savings will vary based on the wattages you purchase. When comparing incandescent or halogen bulbs to ENERGY STAR qualified bulbs or fixtures, compare the light output, or lumens, and not Watts. Watts equal the energy used, not the amount of light provided.