Posted by Don Klipstein on June 7, 2010, 3:07 pm
>On 17/05/10 6:53 PM, Glenda Copeland wrote:
<I snip a bit to edit for space>
>> Do you know how much power a lighted switch uses?
>These have an NE-2 neon bulb which draws about 0.6mA, so at 120V it's
>around 0.07 watts. So 1000 lighted switches would be a little less than
> a 75 watt light bulb.
My experience with a lighted switch is that its neon lamp is either
an A1C ("mini-NE-2H") or a C2A (NE-2H). Those get more like 2 mA.
>Suffice it to say, the watt-hours you'd save with even 50 unlighted
>versus lighted switches would barely be measurable, even over the course
>of a year.
One of these can easily consume 2 KWH per year.
>Some people unplug things like phone chargers when not in use. I.e. an
>iPhone charger draws 0.2W even when the phone is not connected, close to
>3X what a lighted switch draws, but still a trivial amount.
>You can buy power strips with individual switches to avoid unplugging
>wall warts all the time. But you'd probably never recover the cost of
>the power strip in saved electricity.
Plenty of wall warts consume a watt or two even when no load is
connected. As in basically all of the older technology ones that weigh
more and get warm to the touch even when operated unloaded. That is
fairly easily 8 to 16 KWH per year for each one.
--
- Don Klipstein (don@misty.com)
Posted by Roy on June 9, 2010, 4:22 pm
> On 07/06/10 12:07 PM, Don Klipstein wrote:
> >> On 17/05/10 6:53 PM, Glenda Copeland wrote:
> > <I snip a bit to edit for space>
> >>> Do you know how much power a lighted switch uses?
> >> These have an NE-2 neon bulb which draws about 0.6mA, so at 120V it's
> >> around 0.07 watts. So 1000 lighted switches would be a little less than
> >> a 75 watt light bulb.
> > My experience with a lighted switch is that its neon lamp is either
> > an A1C ("mini-NE-2H") or a C2A (NE-2H). Those get more like 2 mA.
> I was going by the NE-2, which actually is about 0.03W at 120V, but an
> NE-2H is about 0.2W, and an A1C is about 0.14W. So if the light switch
> was never turned on, and it was an NE-2H, it would be about 1.7KWH per
> year, so you're right, about 2KW a year if it's an NE-2H.
==
Which is negligible...not to worry about...not to budget for...not to
have ulcers over. In other words...forget it.
==
Posted by Roy on June 9, 2010, 7:56 pm
> On 09/06/10 1:22 PM, Roy wrote:
> >> On 07/06/10 12:07 PM, Don Klipstein wrote:
> >>>> On 17/05/10 6:53 PM, Glenda Copeland wrote:
> >>> <I snip a bit to edit for space>
> >>>>> Do you know how much power a lighted switch uses?
> >>>> These have an NE-2 neon bulb which draws about 0.6mA, so at 120V it's
> >>>> around 0.07 watts. So 1000 lighted switches would be a little less than
> >>>> a 75 watt light bulb.
> >>> My experience with a lighted switch is that its neon lamp is either
> >>> an A1C ("mini-NE-2H") or a C2A (NE-2H). Those get more like 2 mA.
> >> I was going by the NE-2, which actually is about 0.03W at 120V, but an
> >> NE-2H is about 0.2W, and an A1C is about 0.14W. So if the light switch
> >> was never turned on, and it was an NE-2H, it would be about 1.7KWH per
> >> year, so you're right, about 2KW a year if it's an NE-2H.
> > ==
> > Which is negligible...not to worry about...not to budget for...not to
> > have ulcers over. In other words...forget it.
> I agree, probably 25 cents per switch per year. But didn't someone claim
> that they'd reduced their electric bill by $2.50 a month by getting rid
> of a bunch of these sorts of loads? I doubt if it was true.
==
Yes, quite cheap for a light to indicate the location of switches in
the dark. People are a puzzle sometimes.
==
Posted by Jim Elbrecht on June 10, 2010, 6:54 am
-snip-
>==
>Yes, quite cheap for a light to indicate the location of switches in
>the dark. People are a puzzle sometimes.
>=
"Meditatio" by Ezra Pound
When I carefully consider the curious habits of dogs
I am compelled to conclude
That man is the superior animal.
When I consider the curious habits of man
I confess, my friend, I am puzzled.
Jim
Posted by Boycott_BP on June 10, 2010, 5:38 am
wrote:
>On 09/06/10 1:22 PM, Roy wrote:
>>> On 07/06/10 12:07 PM, Don Klipstein wrote:
>>>
>>>>> On 17/05/10 6:53 PM, Glenda Copeland wrote:
>>>> <I snip a bit to edit for space>
>>>
>>>>>> Do you know how much power a lighted switch uses?
>>>
>>>>> These have an NE-2 neon bulb which draws about 0.6mA, so at 120V it's
>>>>> around 0.07 watts. So 1000 lighted switches would be a little less than
>>>>> a 75 watt light bulb.
>>>
>>>> My experience with a lighted switch is that its neon lamp is either
>>>> an A1C ("mini-NE-2H") or a C2A (NE-2H). Those get more like 2 mA.
>>>
>>> I was going by the NE-2, which actually is about 0.03W at 120V, but an
>>> NE-2H is about 0.2W, and an A1C is about 0.14W. So if the light switch
>>> was never turned on, and it was an NE-2H, it would be about 1.7KWH per
>>> year, so you're right, about 2KW a year if it's an NE-2H.
>>
>> ==
>> Which is negligible...not to worry about...not to budget for...not to
>> have ulcers over. In other words...forget it.
>I agree, probably 25 cents per switch per year. But didn't someone claim
>that they'd reduced their electric bill by $2.50 a month by getting rid
>of a bunch of these sorts of loads? I doubt if it was true.
25 cents a year is enough for me to rip them all out from my house. I
already got rid of the doorbell because the doorbell transformer costs
close to $10 a year. It dont cost anything to post a sign on the door
that says "KNOCK HARD".
If you want to see your light switches at night. put one of those
solar powered sidewalk lights in a window in every room.
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