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Cost Comparison between LEDs, CFLs and Incandescent light bulbs
|Light bulb projected lifespan||50,000 hours||10,000 hours||1,200 Hours|
|Watts per bulb (equiv. 60 watts)||10||14||60|
|Cost per bulb||$12.95||$3.95||$1.25|
|kWh of electricity used over 50,000 hours||500||700||3000|
|Cost of electricity (@ 0.10 per KWh)||$50||$70||$300|
|Bulbs needed for 50k hours of use||1||5||42|
|Equivalent 50k hours bulb expense||$12.95||$19.75||$52.50|
|Total cost for 50k hours||$62.95||$89.75||$352.50|
Energy Savings over 50,000 hours, assuming 25 bulbs per household:
|Total cost for 25 bulbs||$1,573.5||$2,243.75||$8,812.50|
|Savings to household by switching from incandescents||$7,238.75||$6,568.75||0|
|Savings to household by switching from CFL||$670.00||0||0|
Equivalent wattages and light output of Incandescent, CFL and LED bulbs
Comparing the features of Incandescent, CFL and LED bulbs
|Frequent On/Off Cycling||no effect||shortens lifespan||some effect|
|Turns on instantly||yes||slight delay||yes|
|Heat Emitted||low (3 btu’s/hr)||medium (30 btu’s/hr)||high (85 btu’s/hr)|
|Sensitivity to temperature||no||yes||some|
|Sensitivity to humidity||no||yes||some|
|Hazardous Materials||none||5 mg mercury/bulb||none|
|Replacement frequency (over 50k hours)||1||5||40+|
– Cost of electricity will vary. The figures used above are for comparison only, and are not exact. Residential energy costs among the various states range from 28.53 cents (Hawaii) to 6.34 cents (Idaho) per KWH.
– The cost per bulb for LEDs may vary. We used the figure of $12.95 (for a 60 watt equivalent LED bulb) as an average among lighting retailers.
– Estimates of bulb lifespan are projected, since it would take about 6 years of continuous lighting to test. Some manufacturers claim the new LED bulbs will last up to 25 years under normal household use(Based on 3 hours use per day).
– Bulb breakage and bulb replacement costs have not been factored into this comparison chart. Incandescent bulbs and CFL bulbs are more easily broken than LEDs, which increases their cost of use.
– Most LEDs come with a minimum 2-year guarantee. Any defective LED bulb will usually fail within this time.
– Dimmable LEDs cost about 40% more than non-dimmable LEDs of similar wattage.