Efficiency QuestionLight Emitting Diodes (LEDs)Compact Flourescents (CFLs)Incandescent Light Bulbs
How long will the bulb last? (life span)
Source
50,000 hours9,000 hours1,000 hours
How often would you have to replace each bulb over 50,000 hours of use?
Source
1550
How much electricity does each use in 1 hour on the US grid?8 watts14 watts60 watts
How much electricity does each use in a 24 hour period?
Source
0.19 kilowatts0.34 kilowatts1.44 kilowatts
What is the average yearly electricity cost to operate one light bulb?
Assuming 5hrs/day @$0.10/kWh
Source
$1.46$2.56$10.95
Are any of the types of bulbs sensitive to low temperatures?
Source
NoYes. Some CFLs are rated for use down to 10°F, though they will take longer to turn on in low temperatures.No
Are any of the types of bulbs sensitive to humidity?
Source
Yes. Excessive humidity can cause LEDs to corrode or short out.NoNo
Does turning the light on and off quickly affect the bulb’s lifespan?
Source
NoYes. CFLs should be kept on for at least 15 minutes at a time to protect the bulb’s longevity.No
Does the bulb turn on immediately (or is there a delay)?
Source
YesIt depends. Some CFLs need to warm up to reach full brightness. This can take up to 30 seconds (for bare spiral CFLs) or up to 3 minutes (for globe or reflector shapes).Yes
How durable is the bulb? Can it handle bumps and jostles?
Source
LED bulbs contain no breakable filaments or glass.CFLs will shatter if dropped. Special cleanup is required because they contain mercury.Glass bulbs will shatter if dropped and the filaments can be damaged by excessive vibration.
How many BTUs per hour of heat (heat that is not light) are emitted?
Source
3 BTUs/hr30 BTUs/hr85 BTUs/hr
How many watts of electricity to produce the following number of lumens?
a. 450 lumens:4-5W9-13W40W
b. 800 lumens:6-8W13-15W60W
c. 1100 lumens:9-13W18-25W75W
d. 1600 lumens:16-20W23-30W100W
e. 2600 lumens:
Source
25-28W30-52W150W
Is it safe to throw old bulbs in the trash?
Source
YesNo. CFLs contain mercury and should be recycled.Yes
What color temperatures (in Kelvin) are available?
Source
warm/soft white (2200-3000K)
cool/bright white (3500-4100K)
or daylight (5000-6000K)
warm/soft white (2200-3000K)
cool/bright white (3500-4100K)
or daylight (5000-6000K)
warm/soft white (2200-3000K)

Find a Certified Heating & Cooling Professional In Your Area

Contact a top-rated local expert to help with all of your home's HVAC needs.

Best Heating & Cooling Products

See ratings and reviews for the best in furnaces, air conditioners, heat pumps, boilers and more.

Ready to get a quote from an HVAC contractor?

Let us know what type of service you need and we can connect you with a certified local HVAC contractor.

Please enter a valid name

Please enter a valid phone number

Please enter a valid zip code

Please enter a valid email address

Please select repair or replace

Please select heating, cooling or both