[opendtv] Re: California Prepares to Limit TV Energy Use
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sat, 17 Oct 2009 20:15:52 -0400
I use CFL's most everywhere, without concern for the issues you
mentioned. And most of them still last forever. Most enclosed
fixtures are rated to dissipate the heat from a bulb probably at least
4 times the wattage of whatever CFL you might stick in it. I've also
started buying LED replacement Edison base light bulbs at Sam's Club for
some things and they are even more efficient. But none of the darn
things so far seem to give off more than about the equivalent of a 20W
incandescent so their use is limited except in multi-bulb fixtures.
I keep waiting. My general belief and rule for predicting social
trends and technology is I am often right but usually too soon by a
factor of about 3. ;-(
I don't even know how efficient or what type my TV back light is. But I
have noticed that premium lap top computers are now appearing with LED
back lights, so I assume there are some power savings since premature
back light death of existing laptops isn't usually a problem you hear
much about.
- Tom
Albert Manfredi wrote:
> Tom Barry wrote:
>
>
>> Just checked the back of my 37" Vizio TV/computer
>> display and it says 120V, 3.2A. That would be
>> almost 400W. But I suspect it could be under
>> 100W if they cared, and used LED back light.
>> Just a SWAG there but, if true, that would be a
>> significant savings for someone like me that has
>> used almost all spiral bulbs for 6-8 years.
>>
>
> Right, that's exactly my point. The reason the monitor might be drawing a
> significant percentage of power, in your case, is because you have already
> taken care of a much bigger offender. But the vast majority of people have
> not. To them, that monitor probably amounts to no more than four lit light
> bulbs, which draw that power all evening long. Has California banned
> incandescent light bulbs starting next year, for instance?
>
> In fact, as of today anyway, you can't even use CFLs in every appliance. I
> think one problem is that they have a hard time cooling if mounted "upside
> down," or in enclosed fixtures. It's the seminconductors in the base that are
> the issue. They fail prematurely if they get too hot. It doesn't take a lot
> of these exceptions to equal that TV monitor.
>
> Also, the back lights of LCD TVs, when they aren't LED, are fluorescent. So
> my impression is that blinking it off, e.g. to improve black levels, might
> save more energy than going to LEDs? I'm not sure. Jeroen probably has the
> numbers.
>
> Bert
>
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