Re: [Phys-l] Domestic light sources

[Vern Lindberg <vwlsps@rit.edu>]

> From Wikipedia

"Governments around the world have passed measures to prohibit the sale of incandescent light bulbs<http://en.wikipedia.org/wiki/Incandescent_light_bulb> for general lighting. The aim is to encourage use of more energy-efficient lighting alternatives, such as compact fluorescent lamp<http://en.wikipedia.org/wiki/Compact_fluorescent_lamp> (CFLs) and LED lamps<http://en.wikipedia.org/wiki/LED_lamp>. Brazil<http://en.wikipedia.org/wiki/Brazil> and Venezuela<http://en.wikipedia.org/wiki/Venezuela> started to phase them out in 2005,[1]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-DM-0> and the European Union<http://en.wikipedia.org/wiki/European_Union>, Switzerland<http://en.wikipedia.org/wiki/Switzerland>,[2]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-1> and Australia<http://en.wikipedia.org/wiki/Australia>[3]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-2>started to phase them out in 2009.[4]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-3> Likewise, other nations are planning scheduled phase-outs: Argentina<http://en.wikipedia.org/wiki/Argentina>,[5]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-4> Russia<http://en.wikipedia.org/wiki/Russia>, and Canada<http://en.wikipedia.org/wiki/Canada> in 2012,[6]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-GMC1-5> and Malaysia<http://en.wikipedia.org/wiki/Malaysia> in 2014.[7]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-Utusan-6> Although the USA<http://en.wikipedia.org/wiki/USA> is not phasing out incandescent light bulbs, it has set minimum efficiency standards for lighting which preclude most legacy incandescent designs; these minimum standards phase in between 2012 and 2014.[<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-TLG1-7>8<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-TLG1-7>]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-TLG1-7>"

and


"the federal government enacted the Energy Independence and Security Act of 2007<http://en.wikipedia.org/wiki/Energy_Independence_and_Security_Act_of_2007>, which requires all general-purpose light bulbs that produce 310–2600 lumens<http://en.wikipedia.org/wiki/Lumen_(unit)> of light[8]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-TLG1-7> be 30% more energy efficient (similar to current halogen lamps<http://en.wikipedia.org/wiki/Halogen_lamp>) than current incandescent bulbs by 2012 to 2014. The efficiency standards will start with 100-watt bulbs in January 2012 and end with 40-watt bulbs in January 2014.
Light bulbs outside of this range are exempt from the restrictions (historically, less than 40 Watts or more than 150 Watts). Also exempt are several classes of specialty lights, including appliance lamps, rough service bulbs, 3-way, colored lamps, and plant lights.
By 2020, a second tier of restrictions would become effective, which requires all general-purpose bulbs to produce at least 45 lumens per watt (similar to current CFLs). Exemptions from the Act include reflector flood, 3-way, candelabra, colored, and other specialty bulbs.[<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-28>29<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-28>]<http://en.wikipedia.org/wiki/Phase-out_of_incandescent_light_bulbs#cite_note-28>"

VL

On Jan 18, 2011, at 10:52 AM, Anthony Lapinski wrote:

I don't think so. The Hope Depot here in Princeton, NJ has plenty if
incandescent bulbs, including 150 W, 200 W, and 300 W. Many more CFLs, but
still a big supply of incandescent ones.


Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu<mailto:phys-l@carnot.physics.buffalo.edu>> writes:
On 1/15/2011 9:06 AM, ludwik kowalski wrote:
This is from a message received today:

"It might interest you to know that in UK 100W light bulbs are no
longer available and I heard on the news today that 60W bulbs are also
to be phased out fairly soon. There is growing pressure to move on to
more efficient lighting technologies. ..."

Ludwik

http://csam.montclair.edu/~kowalski/life/intro.html





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I tried to buy some 200 and some 300 watt bulbs last weekend. I could
not find any. Is it now illegal to sell them in the US?
cheers
David
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