What are the pros and cons between Halogen and L.E.D. light bulbs
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M$6 Answers
LED bulbs have an excellent life span (will last years if properly designed), excellent efficiency, good light output (though in a relatively narrow light spectrum in some cases), and are very expensive relative to other bulbs.
Both bulbs provide longer life and higher efficiency compared to standard light bulbs, but at a higher initial cost.
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-quote-
"Buying LED light bulbs is about as complicated as buying an HDTV. Well, maybe not quite that complicated, but pretty close. LED bulbs come in a variety of shapes, sizes, wattage and prices; they can be as cheap as $5 or as much as $100 for a single bulb. The expensive ones can be very bright (100W incandescent bulb equivalent). These LEDs are in the 7 to 13 watt range. The 2.5W to 5W range LEDs will be not be as bright and should not be as expensive. In the photos below we will compare a 50W Halogen to a 2.5W LED bulb. The Halogens go for about $5 each and the LEDs were $12 each. Currently, they cost $14 each, but shop around, the prices bounce up and down.
At Full brightness the Halogen is obviously way brighter than the LED.
Next when dimmed halfway, the LED and the Halogen are producing about the same amount of light. Note the colour difference. The LED light bulb on the left being tested is a ‘Natural’ warm white (more yellow, less blue) but it’s still much less yellow than the Halogen at this brightness.
The lifespan of the LED bulbs is about 50,000 hours whereas the Halogen are probably 2000 hours or less, lower watt Halogen bulbs last longer; a 35W Halogen should last 3000 hours.
In really low dimmer settings, the LED will dim but stays brighter (perhaps because the LED isn’t dimming at the same rate as the Halogen).
Not all LED light bulbs can be dimmed. For instance, this $30 Pharox 4W LED bulb pictured below will start to turn on and off when the dimmer switch is turned down halfway. This bulb has a yellowish green colour to it (it’s quite nice actually) and it’s about as bright as a 40 watt incandescent light bulb. Even after being on all night, the bulb will be cold to the touch (the metal part does get hot though).
LED bulbs and Halogen do not contain any mercury, where as Compact Fluorescent Light bulbs (CFLs) have mercury vapor (which you should not breathe if you break one). Overall, I also find the light is more pleasant for both LED and Halogen when compared to CFLs.
A 50W Halogen bulb can produce nearly 1000 lumen. The Halogen bulb in the photo on the right hand side is producing about 600 lumen. I’m guessing. As I understand, it depends on the light bulb. I think this is a 50Wpar30 Halogen.
The LED on the left, is probably producing about 180 lumen max. Which is still pretty bright (equivalent to 25watt incandescent bulb more or less)."
-end of quote-
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M$According to the Merriam Webster Dictionary, an LED, or light emitting diode, is a semiconductor diode that emits light when a voltage is applied to it.
Lifespan of LED Bulbs
The lifespan of an LED bulb is variable. According to a February 2009 New York Times article, an LED bulb that is touted as lasting 25,000 hours will likely begin to dim at 25,000 hours, not burn out as incandescent bulbs do. Taub wrote, "When a manufacturer says that an LED lamp will last 25,000 or 50,000 hours, what the company actually means is that at that point, the light emanating from that product will be at 70 percent the level it was when new."
Halogen Defined
A halogen bulb is an incandescent lamp filled with halogen gas.
Lifespan of Halogen Bulbs
According to "The Pros and Cons of a Halogen Bulb, as published in Readers Digest in 2000, a halogen bulb typically lasts from "2,000 to 2,500 hours, although some manufacturers guarantee lights for two years or more."
halogen bulbs burn hotter than a standard incandescent bulb. In the past seven years, warnings have been issued for both Halogen and LED light bulbs. For example, in 2003, Cooper Lighting and the Consumer Product Safety Commission issued a warning for 500-watt halogen bulbs, saying that the bulbs may pose a fire hazard. In March 2009, The Consumer Product Safety Commission issued a recall notice for Fresh Décor 10 Count LED Star String Lights, sold at Safeway stores, due to fire hazard.
more Halogen Incandescent Sources resource:
http://www.lightingever.com/kbase/learninglighting/halogen-incandescent-sou...
more LED lights resource:
http://www.lightingever.com/kbase/learninglighting/light-emitting-diode-sou...
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M$www.ledlightsworld.com
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M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$Professional LED lights website : http://www.topledsupplier.com
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