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The industry standard for LED life expectancy is over 50,000 hours of use (over 11 years for lights that are operated 12 hours a day). The lifespan of LEDs is drastically longer than compact fluorescents (CFLs), which have a life expectancy of 8,000 to 10,000 hours. Incandescent lights, which have a life span of 1,000 to 1,200 hours, are being phased out by the government due to their inefficiency. For light equivalent to that produced by a 60 watt incandescent bulb – a standard household lighting unit – a CFL bulb consumes 13 to 18 watts, a good improvement, but an LED uses eight to twelve watts.2 As a final benefit, LEDs are less sensitive to temperature extremes than either incandescent lights or CFLs; they are rated to temperatures as low as -40°F. The prices for LED lights are significantly higher and vary depending on the distributor, but pay off quickly in energy savings and reduced need to replace light bulbs. For instance, the store in Anaktuvuk Pass Alaska invested $6,600 in LED lighting with the goal of making the store almost entirely lit by LEDs. In doing so, the diesel consumption for electricity was cut by 1,000 gallons per year and will pay itself off in less than one and half years. The village of Anaktuvuk Pass has installed LED streetlights and has switched several municipal buildings and the village automotive garage over to LED with potential diesel fuel conservation results of over 100 gallons per day. Lighting Disposal Another consideration is disposal of lighting. CFL bulbs in particular use mercury to create light, which is toxic to the health of people and the environment. Exposure to mercury from broken CFLs can cause brain damage and other serious long term side effects and, even in very small doses, can pollute large areas (0.035 ounces of mercury can contaminate a two acre pond). Incandescent lights also emit mercury into the environment during use at even greater levels than CFLs. When disposing of CFL or incandescent light bulbs, it is critical to avoid breaking the bulbs (especially CFLs) as this releases mercury into the air. The following link provides information on mercury gas, proper cleanup procedures, and methods of disposing of CFL bulbs. It is essential to assure these products do not end up in landfills (contact an expert to see about proper disposal in Alaska). LEDs on the other hand are solid state lights – meaning they contain no gases like CFLs – and can be disposed of just like any other recyclable material. Also, because they last over five times 2 See LED information website for statistics. Sustainable Energy Opportunities: Best Practices for Alaska Tribes Page 11 For more information on LED lighting purchase and information, see page 43-45 EPA webpage on CFL bulbs, their use and disposal http://www.epa.gov/cfl/PDF Image | Sustainable Energy Opportunities: Best Practices for Alaska Tribes
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