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Lighting | Lighting Requirements | light bulb shape & socket/base types | LED Lights | CFLs | Fluorescent lights|
Types - Incandescent, Compact Fluorescent Lamp (CFL) and Light emitting diode (LED) Bulbs
Luminous efficacy table
Energy saving lamps have high luminous efficacy (more lumens per watt).
Comparison of 65 watt (700-900 lumens) equivalent bulbs. Nov 2013
Note: If you compute over the lifetime of the LED (23 yrs) the cost CFLs and LEDs is about the same. 1. You will see things like $200 savings over the life of the bulb on the package. This is over an expected life of 23 years and uses a cost of electricity of 15¢/kWh It does not take into account the time value of money. i.e. a savings of $5 in 23 years is not worth as much as $5 today. 2. Incandescent: Edison type bulb. - Tungsten 3. LED's were dimmable, CFL's here were not. (There are dimmable CFLs) 4. Efficacy is expected to increase to 202 lm/W by 2015 (DOE). * 5. Projections for LED costs per 1,000 lumens (klm) in 2015 range from $2.20 to $6 * See LEDs Magazine - LED fabrication roadmap targets LED prices of $2.20/klm by 2015 According to Strategies Unlimited, the average manufacturing cost per klm has declined from $13 in 2011 to less $3.65 in Sept. 2013 6. Manufacturing Energy - The DOE in the report below adds manufacturing and packaging energy use in order to compare life-cycle energy savings. The numbers are Mega Joules (MJ)/20 million lumen-hours, so since it takes 22 incandescent bulbs to match the life of 1 LED they use the energy for 1 bulb X 22. This is very small compared to the energy consumed in using the bulb which is: 15,000 MJ/20 million lumen-hours for incandescent and 4,000 MJ/20M l-h for CFL and LEDs Source: Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting | DOE* In Oct. 2017 a PhilipsModel # 461137 (8.5W 800 lumens) 4 pack at Home Depot cost $7.97. for $2.50/Klumen.
and a 3 pack of 9W 750 lu Duracell Ultra at Batteries Plus Bulbs was $6.99 or $3/Klu.
Note: Other sources report life as:
Incandescent = 2,000 hrs
LEDs in electronics - 50,000 hrs
LED household lighting bulbs - 25,000 hrs
In August, 2013 Consumer Reports tested bulbs.
e.g. CFL's take longer to reach full brightness especially in the cold (even a 65° room).
CFL's contain mercury.
LED's on the other hand tend to be flat and directional.
LEDs contain lead, arsenic and a dozen other potentially dangerous substances.
Color/Temperate: Different bulbs emit light of different colors in the light spectrum.
Color temperature relates to the fact that when an object is heated, it will emit a color that is directly related to the temperature of that object.
Traditionally incandescent bulbs emitted warmer colors and florescent bulbs cooler temperatures, but newer compact florescent bulbs and LED can be purchased in a range of temperatures.
See Light Spectrum.
A19 - Common household light bulb shape CRI - Color Rendering Index CCT - Correlated color temperature CW - Cool White - 4000-5000K DOE - Department of Energy E12 - Candelabra Screw E26 - Standard (Medium) screw Energy Star qualified - Energy star for other appliances has to do with energy efficiency. For LED bulbs in also includes as a number of performance related metrics such as light distribution, durability, lumen maintenance and color quality. See Why Energy Star LED light bulbs are a rare breed | GizMag.com G25 - Global bulb shape HID - High-intensity discharge lamp - Mercury-vapor, Metal-halide, Sodium-vapor lamps klm - 1,000 lumens kWh - KillaWatt-hour LCA - Life-Cycle Assessment LED - light-emitting diode L-70 - Life = Time taken for the brightness to fall to 70% of its original value. Lumen (lm) - Measure of light brightness MJ - Mega Joule = 0.27 kWh OLED - organic light-emitting diodes PLED - polymer light-emitting diodes RoHS - Restriction of Hazardous Substances S-6 Miniature standard shape ... S-14 Standard bulb shape and size [14/8 in or 1 3/4 in diameter] SSL - Solid State Lighting - LED, OLED or PLED WW - Warm White - 2700-3500K
Gallan.cc | For CFLs,LED lights,lighting,lighting lamps,light bulbs,lights and lighting,bulbs and lighting
EagleLight | LED Lights, LED Light Bulbs, LED Lighting
Where to get them on the LED page
Light Bulb size/dimensions nomenclature (socket types)
Compact Fluorescent Bulbs
Compare: LED Lights vs CFL vs Incandescent Lighting Chart
Lighting Choices to Save You Money | Department of Energy
Life-cycle study shows current LED bulbs about on par with CFLs, but next-generation twice as good : TreeHugger
Energy Saving Compact Fluorescent Lamp Bulbs (CFL)
Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting | Department of Energy Products
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