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  2. Tanning lamp - Wikipedia

    en.wikipedia.org/wiki/Tanning_lamp

    This allows a 100 watt lamp to fully light with as little as 65 watts. S12 lamp starter. The disadvantage of the newer electronics is price. It can cost 3 to 5 times more per lamp to use electronic ballasts than traditional choke ballasts, which is why choke ballasts are still used in the majority of new tanning systems.

  3. Cost of electricity by source - Wikipedia

    en.wikipedia.org/wiki/Cost_of_electricity_by_source

    The levelized cost of electricity (LCOE) is a metric that attempts to compare the costs of different methods of electricity generation consistently. Though LCOE is often presented as the minimum constant price at which electricity must be sold to break even over the lifetime of the project, such a cost analysis requires assumptions about the value of various non-financial costs (environmental ...

  4. United States lighting energy policy - Wikipedia

    en.wikipedia.org/wiki/United_States_lighting...

    60 lumens per watt for lamps > 40 watts, 50 lumens per watt for lamps > 15 watts and ≤ 40 watts, and; 40 lumens per watt for lamps < 15 watts; There are 14 states that have adopted the 2009 IECC, six have an effective date set for late 2010 early 2011. Within the next three years, approximately 33 states will have adopted and implemented IECC ...

  5. LED lamp - Wikipedia

    en.wikipedia.org/wiki/LED_lamp

    Bulb lifetime (years) @ 6 hours/day: 22.8 6.8 9.1 4.6 11.4 4.6 0.46 0.46 Energy cost over 20 years @ 16.1 cents/kWh [96] $28 $46 $63 $60 $67 $99 $303 $423 Cost of bulbs over 20 years $7 $10 $5 $13 $8 $8 $51 $18 Total cost over 20 years $35 $56 $69 $73 $75 $106 $355 $441 Total cost per 860 lumens $36 $60 $73 $78 $79 $118 $407 $441

  6. Phase-out of incandescent light bulbs - Wikipedia

    en.wikipedia.org/wiki/Phase-out_of_incandescent...

    The bill established a minimum standard of twenty-five lumens per watt by 2013 and sixty lumens per watt by 2018. [102] [103] [104] The California regulations were challenged in court by light bulb manufacturers upon the US Energy Department's action reversing the 2014 regulation that would have taken effect on 1 January 2020. [105]

  7. Incandescent light bulb - Wikipedia

    en.wikipedia.org/wiki/Incandescent_light_bulb

    For example, a 100-watt, 1000 hour, 120-volt lamp will produce about 17.1 lumens per watt. A similar lamp designed for 230 V would produce only around 12.8 lumens per watt, and one designed for 30 volts (train lighting) would produce as much as 19.8 lumens per watt. [76] Lower voltage lamps have a thicker filament, for the same power rating.

  8. Centennial Light - Wikipedia

    en.wikipedia.org/wiki/Centennial_Light

    The bulb's longevity has been attributed to the high quality of its manufacture, [4] it being seldom turned off, [5] [6] and its low wattage. [5] [6] Originally a 60-watt bulb, the light has for many years emitted dim light equivalent to a 4-watt bulb, about the strength of a nightlight. [4]

  9. Lighting power density - Wikipedia

    en.wikipedia.org/wiki/Lighting_power_density

    A defined list of many possible space types within a building the associated watts per square foot allowance. For example, ANSI/ASHRAE/IESNA Standard 90.1-2007 allows the Emergency Space of a hospital to be designed for 2.7 watts per square foot, but the Recovery areas of a hospital would be allowed 0.8 watts per square foot.

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