Re: Anyone moved to LED Lighting?

[don@xxxxxxxxxxxxxx (Don Klipstein)]

In article <hhjokd$275$1@xxxxxxxxxxxxxxxxxxxxxxxxxx>, The Daring Dufas wrote:
(with some editing by me to keep down characters-per-line)
>Don Klipstein wrote:
>> <hhi9g8$14k$1@xxxxxxxxxxxxxxxxxxxxxxxxxx>, The Daring Dufas wrote:
>>> Dave Houston wrote:
>>>> The Daring Dufas <the-daring-dufas@xxxxxxxxxxxxxx> wrote:
>>>>
>>>>> CFL units also
>>>>> use switching power supplies to operate the lamp and a wholesale change
>>>>> over to CFL lighting could cause problems in older buildings.
>>>> I'm not sure how much of a problem this will be. Most comm'l/industrial
>>>> buildings use tubular fluorescents and/or HPS lights which
>>>> save far more energy than CFLs so there's no incentive (nor mandate) to
>>>> switch to CFLs. (Changing from magnetic to electronic ballasts may be a
>>>> problem but I don't know how prevalent this is.)
>>>>
>>>> As lighting is only 9% of residential energy use, even changing to 100%
>>>> CFL/LED with SMPS may not be a major problem. Electic rates already
>>>> embed charges for residential power factor issues (rather than use
>>>> demand metering). It's likely that the utilities will merely ask for
>>>> rate increase to compensate for their increased costs related to
>>>> harmonics.
>>> I was thinking more along the lines of older apartment buildings in
>>> large cities, especially very old ones. The building may have its
>>> own transformer in the basement and if it was never updated since
>>> the 1920's or 1930's, there could be some problems caused by the
>>> asymmetrical loads.
>>
>>   CFLs are symmetric loads.
>>
>>  - Don Klipstein (don@xxxxxxxxx)
>
>They are? I didn't know that. I must search The Interweb for information
>unless you could please point me in the right direction. If I don't
>stand corrected, I'm not learning anything. 8-)

  As for a quickie here, inconvenient to resurrect the way my newsreader
and Google news archives work, is a cite in this thread to actual
oscilloscope traces of CFL current waveforms.

  Push me enough, I will make the time to repost the links - but allow me
a bit of time here...

 - Don Klipstein (don@xxxxxxxxx)