In the days of Thomas Edison when candles and oil lamps were the standard for home lighting, it was probably pretty far fetched to believe that Edison’s filament based electric light bulb was going to become the wave of the lighting future. And that the incandescent light bulb has lasted over 100 years for lighting is a real testament to Edison. However, due to new federal legislation, the Energy Independence and Security Act of 2007, many of the incandescent bulbs will no longer be produced after 2012 and no longer used after 2014. This act calls for the reduction in the amount of energy required to light a light bulb. Similar legislation has or is being passed in other developed countries in an effort to decrease greenhouse gas emissions. So we are heading for a lighting change. Are you ready?
As a residential home designer, I am creating electrical designs all the time and my clients often want to know how their light fixtures (especially their recessed cans) are going to work after 2014. Most homeowners are concerned that they are going to have to replace all of their light fixtures by 2014 – an expense and hassle that most are not excited about. So after doing some research, I’ve found out that there are products on the market that will allow homeowners to still use their existing incandescent fixtures. The non-incandescent alternatives though are technically not all non-incandescent. Halogens and xenons will still be allowed because the Energy Independence and Security Act of 2007 only required that the energy consumption of the light bulb to be reduced by 30%. Certain specialty bulbs are exempt from the legislation too.
What’s amazing is that most consumers are totally unaware of this legislation and what it means for their home lighting options in the near future. So here is a review of the different types of light choices and the pros and cons of each:
Halogen
Most of us have used or seen halogen lamps as they have been on the market for some time and frequently used on car headlights. Halogens are actually a type of incandescent light in that they still use a tungsten coated filament that has an electric charge passed through it that causes the filament to get white hot and emit a light. The difference with halogen is the gas that is inside the bulb that allows the tungsten particles to rebind to the filament after the light is off and cause the filament to last longer and burn more evenly. Here are the pros and cons of Halogen:
Pros: Halogen still gives off a yellowish light that is similar to a traditional incandescent, it uses less energy than a traditional incandescent, produces a more consistent level of light as the bulb ages, and comes on immediately with no warm up period or flickering.
Cons: It gives off a tremendous amount of heat (and thus wastes some energy), it doesn’t last as long as LED, it has a yellowish color which is not preferred by some. The bulb cannot be touched or the oil in our hands can cause the bulbs to overheat and go out. Therefore, most halogen bulbs are encased in a fixture.
Xenon:
Xenon bulbs use xenon gas to produce light rather than a filament. The light is produced when a current of electricity is supplied between two electrodes. An arc pattern appears and wha-la you have light. I’m sure it’s a little more complicated than that (like a ballast being used as well), but this level of understanding suffices for my non-electrical engineering brain.
Pros: In terms of durability, xenon light bulbs have the edge on halogen bulbs and regular incandesents. This can be attributed to the fact that xenon light bulbs contain no filament. Jarring and vibrations can cause breakage of a light bulb filament so xenons are a little less fragile than some other lights. Also, xenon light bulbs typically last longer than halogen light bulbs. A xenon light is rated to last for anywhere between 8,000 and 20,000 hours. Halogen lights are rated to last anywhere between 2,000 and 6,000 hours. Lastly, xenon lights emit a white light that is somewhat bluish in color. This white light can help with visibility especially at night. That’s why some flashlights and car headlights use xenon bulbs. They also come on immediately and don’t have a flicker, hum or warm up period.
Cons: Xenon bulbs are more expensive than incandescents, but they last longer so the up front cost is more, however, the cost per use is probably about the same. Some people don’t like the bluish cast to the light and prefer what they are used to in the yellowish incandescent type bulb. While they are more energy efficient than the incandescents, they are not as efficient as the LED style. Xenon lights also still generate some heat.
Compact Fluorescent Light (CFL):
Flourescent light bulbs have been around a long time and are widely used in commercial buildings because they use less energy. Now with the new federal regs, the push in the industry is to make fluorescents more commonplace in the residential segment of the market. Obviously CFLs for existing incandescents fixtures is not a problem, the CFL bulbs are very prevalent on the market. There are several pros and cons:
Pros: Energy Savings is the major pro - For a given light output, CFLs use 20 to 33 percent of the power of equivalent incandescent lamps. Also, the typical luminous efficacy of CFL lamps is 60 to 72 lumens per watt,and that of normal domestic incandescent lamps is 13 to 18 lumens per watt. They also do not give off much if any heat. Because of the energy savings, it decreases the overall greenhouse gas effect for our planet.
Cons: Despite the major pro of energy savings, there are some cons – namely that CFLs take a moment to come on, they can flicker, they can hum, they cast a yellowish light, and for me anyway, it’s hard to translate how bright the bulb will be as compared to an incandescent bulb. The manufacturers usually print the equivalency on the CFL packaging, but they still seem dimmer in real life than what is stated. The last con is that CFLs contain mercury and from a disposal standpoint there is an environmental concern.
While neither a Pro or a Con, CFLs are also more expensive than incandescent in regards to upfront cost, but the energy savings after purchase more than compensates for this – so it is really a matter of getting used to spending more on bulbs, replacing them less frequently, and using less energy to use them.
Light Emitting Diode (LED):
If you’ve read any of my other blog posts, you can probably tell by my writing where my preferences lie, but I have to say that I think LED is the up and comer for the lighting future. LED is a semi-conductor type of lighting technology that has been used for some time in most of our electronic gadgets, television remote controls, and home appliances. There are some drawbacks, but the LED technology has gotten even more efficient over the years.
Pros: A major pro of LED is the energy efficiency. The average LED light (according to wikipedia.com) has 46 lumens per watt. However, a recent prototype in a lab registered 208 lumens/watt. The other major pros are the durability and life expectancy. Since there isn’t a filament to break, LED lights are very durable. And the typical lifetimes quoted are 25,000 to 100,000 hours but heat and current settings can extend or shorten this time significantly. LED lights usually don’t immediately “burn out” like incandescents, rather they get dimmer gradually over time. The other pros over CFLs is that they don’t give off a yellow light, they don’t hum or flicker, and they come on instantly. Lastly, LEDs don’t give off much heat at all and remain cool to the touch. This helps to decrease home cooling costs during warmer weather.
Cons: The main con is the high price – right now an LED lightbulb will cost you around $40 to $50 bucks or more. But considering the really long life span of a LED bulb, the cost is not that bad. The other issue with LED for some folks is the color temperature of the light. LEDs can give off more of a bluish light which some people may not like. Lastly, the technical issue with LED has to do with diffusion of the light. Typically LED light only shines in one direction rather than diffusing. That’s why in the picture above, you see a bunch of little lights going around the bulb in various grid patterns. This was done to mimic the light pattern of a regular incandescent bulb.
Below is a picture of one of many conversion kits on the market right now that will convert your recessed incandescent light fixture to an LED. So no worries.
LED 6in recessed light conversion kit
Laurie Crum,
Design Consultant, Summit Design Remodeling
Summit Design Remodeling is a design/build remodeling firm serving Northern Virginia and suburban Maryland.
Email: info@summitdesignremodeling.com
Website: SummitDesignRemodeling.com