CFL on photo on/off?
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From: Geoffrey S. Mendelson on 15 Mar 2010 09:54 Meat Plow wrote: > What is the problem with operating a CFL on a dusk to dawn device that > uses a photo sensor? I'm not sure I'd bother. For example, we have a bathroom with no windows in the middle of a dark hallway. I just out in a CFL and leave it on. Lights up the room, lights up the hallway. At what I pay for electricity it costs under $9 a year, which is less than the cost of a light operated switch or timer, and probably less current than a timer anyway. Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel gsm(a)mendelson.com N3OWJ/4X1GM New word I coined 12/13/09, "Sub-Wikipedia" adj, describing knowledge or understanding, as in he has a sub-wikipedia understanding of the situation. i.e possessing less facts or information than can be found in the Wikipedia.
From: GregS on 15 Mar 2010 11:37 In article <3ji43u.i4g.17.14(a)news.alt.net>, Meat Plow wrote: >On Mon, 15 Mar 2010 13:54:04 +0000 (UTC), "Geoffrey S. Mendelson" ><gsm(a)cable.mendelson.com>wrote: > >>Meat Plow wrote: >>> What is the problem with operating a CFL on a dusk to dawn device that >>> uses a photo sensor? >> >>I'm not sure I'd bother. For example, we have a bathroom with no windows >>in the middle of a dark hallway. I just out in a CFL and leave it on. >> >>Lights up the room, lights up the hallway. >> >>At what I pay for electricity it costs under $9 a year, which is less than the >>cost of a light operated switch or timer, and probably less current than >>a timer anyway. >> >>Geoff. > >Outside Lamp post for my mom. She says traditional bulbs don't last >long enough and there is no way to enable it in an always on mode. >Besides she is too frugal to want to let it operate 24/7. She's the >kind of person who washes out tin foil and reuses it :) Many neighborhoods are too dark at night. My old neighborhood in the 60's, My mother complained about no street lights. Realitor said there is enough light from the neighbors outside lights, and it was true. Every fourth house also had a gas lantern. That neighborhood is now too dark. If those people started using CFL's they could afford to keep them on. greg
From: GregS on 15 Mar 2010 11:39 In article <hnlgnv$h66$2(a)usenet01.srv.cis.pitt.edu>, zekfrivo(a)zekfrivolous.com (GregS) wrote: >In article <3ji43u.i4g.17.14(a)news.alt.net>, Meat Plow wrote: >>On Mon, 15 Mar 2010 13:54:04 +0000 (UTC), "Geoffrey S. Mendelson" >><gsm(a)cable.mendelson.com>wrote: >> >>>Meat Plow wrote: >>>> What is the problem with operating a CFL on a dusk to dawn device that >>>> uses a photo sensor? >>> >>>I'm not sure I'd bother. For example, we have a bathroom with no windows >>>in the middle of a dark hallway. I just out in a CFL and leave it on. >>> >>>Lights up the room, lights up the hallway. >>> >>>At what I pay for electricity it costs under $9 a year, which is less than > the >>>cost of a light operated switch or timer, and probably less current than >>>a timer anyway. >>> >>>Geoff. >> >>Outside Lamp post for my mom. She says traditional bulbs don't last >>long enough and there is no way to enable it in an always on mode. >>Besides she is too frugal to want to let it operate 24/7. She's the >>kind of person who washes out tin foil and reuses it :) > >Many neighborhoods are too dark at night. My old neighborhood >in the 60's, My mother complained about no street lights. >Realitor said there is enough light from the neighbors outside >lights, and it was true. Every fourth house also had a gas lantern. >That neighborhood is now too dark. If those people started using CFL's >they could afford to keep them on. > I also like to complain about light that shines in my eyes. Much of the light from lights goes up into the air where its useless, and also into my eyes. greg
From: Geoffrey S. Mendelson on 15 Mar 2010 10:44 Meat Plow wrote: > Outside Lamp post for my mom. She says traditional bulbs don't last > long enough and there is no way to enable it in an always on mode. > Besides she is too frugal to want to let it operate 24/7. She's the > kind of person who washes out tin foil and reuses it :) There are standard bulbs made for use in these places. They are made with thicker filaments so they last much longer. Another trick is to use a 240 volt bulb, they run at much lower intensity (and are that much less efficent) but they supposedly last "forever". Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel gsm(a)mendelson.com N3OWJ/4X1GM New word I coined 12/13/09, "Sub-Wikipedia" adj, describing knowledge or understanding, as in he has a sub-wikipedia understanding of the situation. i.e possessing less facts or information than can be found in the Wikipedia.
From: GregS on 15 Mar 2010 12:23
In article <slrnhpshq8.1um.gsm(a)cable.mendelson.com>, gsm(a)mendelson.com wrote: >Meat Plow wrote: >> Outside Lamp post for my mom. She says traditional bulbs don't last >> long enough and there is no way to enable it in an always on mode. >> Besides she is too frugal to want to let it operate 24/7. She's the >> kind of person who washes out tin foil and reuses it :) > >There are standard bulbs made for use in these places. They are made >with thicker filaments so they last much longer. Another trick is to >use a 240 volt bulb, they run at much lower intensity (and are that much >less efficent) but they supposedly last "forever". > While not being efficient I much prefer the warm whites, but they can be more efficient seeing in foggy conditions. I once built a lantern with a variable light control. A resistor. Shining the light at full brightness into Lake Erie showed nothing. getting it nice and dim, you could see right through the water. greg |