How does Daylight Saving Time save energy?

Answer 1

Having more hours of daylight is supposed to reduce the number of hours lights are turned on each evening, but that saves no energy. It only wastes energy because Daylight Saving Time does not bring more daylight. People have to wake up to a darker sky and fiddle with electricity if they cannot see.actually daylight saving time was started during a war so there could be more light to battle in

-UBERnoob1098

+++++

You are right in that it brings no more daylight. The "a war" was actually World War Two. Britain introduced what in fact we now call British Summer Time to help farmers particularly by making better use of the available daylight, but the belief grew that it made it harder for the Luftwaffe to bomb British cities. It didn't of course because the numbers of hours of light and dark do not change, only our clock reference with respect to longitude-determined solar noon. The bombers needed only to re-schedule their raids. Similarly with land and sea action - the effect of day or night on fighting was down to lengths of either, NOT to clock time.

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Its only practical use is in moving the working day so we can use the evenings more effectively, but it comes with a cost especially the further North you live. Each time the clock is moved forwards or backwards, our bodies' internal natural clocks are temporarily put out of sync with the daylight they need for normal calibration, and the clock changes are marked by a short spike in traffic and other accidents, and in heart attacks and strokes. Effectively we all suffer from something akin to "jet lag". Night-shift workers are similarly but more seriously affected.

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A peculiar myth common in Britain is that each change from GMT to BST or back gains or loses an hour in bed. It doesn't really, unless perhaps you change the clocks before going to bed, then set the alarm. If you let your body decide correctly, it will sleep and wake nocturnally and as and when physiology decides, but most of us now live to very artificial day/night arhythms that taken to sleep-deprivation extremes (common particularly among young people fixated on the internet) are bad for us! The change is always set officially at 2am on a Sunday morning to cause the least disruption, but it's up to individuals to decide when they change their own time-pieces.

Answer 2

As far as I know...The prctise of daylight saving began quite a long time ago..the clock was advanced or delayed by an hour to ensure that people who worked stayed at work did not come home when there was light that way unnecessary use of electricity at homes could be minimised. That practice does not make sense anymore because most offices work 24/7 and energy saving by working at particular times does not work. However, this will hold good only if the above reason is valid. Today, we have DST to save money on energy because there is more daylight at the end of the day when people are at home.

Answer 3

One of the biggest reasons we change our clocks to Daylight Saving Time (DST) is that it reportedly saves electricity. Newer studies are being done to see if that long-held reason is true. In general, energy use and the demand for electricity for lighting our homes is directly connected to when we go to bed and when we get up. Bedtime for most of us is late evening through the year. When we go to bed, we turn off the lights and TV. In the average home, 25 percent of all the electricity we use is for lighting and small appliances, such as TVs, VCRs and stereos. A good percentage of energy consumed by lighting and appliances occurs in the evening when families are home. By moving the clock ahead one hour, we can cut the amount of electricity we consume each day. Studies done in the 1970s by the U.S. Department of Transportation show that we trim the entire country's electricity usage by about one percent EACH DAY with Daylight Saving Time. Daylight Saving Time "makes" the sun "set" one hour later and therefore reduces the period between sunset and bedtime by one hour. This means that less electricity would be used for lighting and appliances late in the day. We may use a bit more electricity in the morning because it is darker when we rise, but that is usually offset by the energy savings in the evening. We also use less electricity because we are home fewer hours during the "longer" days of spring and summer. Most people plan outdoor activities in the extra daylight hours. When we are not at home, we don't turn on the appliances and lights. A poll done by the U.S. Department of Transportation indicated that Americans liked Daylight Saving Time because "there is more light in the evenings / can do more in the evenings." While the amounts of electricity saved per household are small...added up they can be very large. In the winter, the afternoon Daylight Saving Time advantage is offset by the morning's need for more lighting. In spring and fall, the advantage is less than one hour. So, Daylight Saving Time saves energy for lighting in all seasons of the year except for the four darkest months of the year (November, December, January and February) when the afternoon advantage is offset by the need for lighting because of late sunrise. A report was released in May 2001 by the California Energy Commission to see if creating an early DST or going to a year-round DST will help with the electricity problems the state faced in 2000-2002. You can download an Acrobat PDF copy of the staff report, Effects of Daylight Saving Time on California Electricity Use, Publication # 400-01-13, (PDF file, pages, 5.2 megabytes). The study concluded that both Winter Daylight Saving Time and Summer-season Double Daylight Saving Time (DDST) would probably save marginal amounts of electricity - around 3,400 megawatt-hours (MWh) a day in winter (one-half of one percent of winter electricity use - 0.5%) and around 1,500 MWh a day during the summer season (one-fifth of one percent of summer-season use - 0.20%). Winter DST would cut winter peak electricity use by around 1,100 megawatts on average, or 3.4 percent. Summer Double DST would cause a smaller (220 MW) and more uncertain drop in the peak, but it could still save hundreds of millions of dollars because it would shift electricity use to low demand (cheaper) morning hours and decrease electricity use during higher demand hours. The Energy Commission has also published a new report titled The Effect of Early Daylight Saving Time on California Electricity Consumption: A Statistical Analysis. Publication # CEC-200-2007-004, May 27, 2007. (PDF file, 592 kilobytes) In May 2001, the California state legislature sent a Senate Joint Resolution (SJRX2 1) to the White House and Congress asking that states be allowed to extend Daylight Saving Time year round. Congress and the White House did not act on the request because of the world-changing events of September 11, 2001. No new legislation has been passed in California since then. A more recent study - in draft form as of February 2008 - by Matthew Kotchen and Laura Grant of the University of Santa Barbara concludes that Daylight Saving Time in Indiana actually increases residential electricity demand. That study titled "Does Daylight Saving Time Save Energy? Evidence From a Natural Experiment in Indiana". (PDF file) looked at the electricity use when portions of the state finally started to observe DST. Before the new extended DST, portions of Indiana did not observe DST. Some have wondered whether this study would be true for the entire United States. Initial analysis by staff of the California Energy Commission says a similar study may not yield the same results for California because: * The use of residential air conditioning is relatively low in Indiana, and the saturations are low. Where as California has high usage of air conditioning in the summer. * Heating use is relatively high in Indiana, while it is relatively low in California. * The diurnal variation in temperature is low while California is very high. * Indiana is located in western edge of the same time zone as Maine and Florida, but the sun actually comes up at an earlier time than those other two states. * Indiana's north-south location will affect how long the days are in the summer and might very well lead to different results in different areas. So, while the analysis is of interest to Indiana, it's conclusions may not be totally correct for California or the rest of the country. Additional studies on electricity savings, the first national study since the 1970s, are being done by the U.S. Department of Energy, and more definitive results on DST on electricity use will be coming in the next year or two. But why do we have Daylight Saving Time to begin with? Who created the laws and regulations that we follow One of the biggest reasons we change our clocks to Daylight Saving Time (DST) is that it reportedly saves electricity. Newer studies are being done to see if that long-held reason is true. In general, energy use and the demand for electricity for lighting our homes is directly connected to when we go to bed and when we get up. Bedtime for most of us is late evening through the year. When we go to bed, we turn off the lights and TV. In the average home, 25 percent of all the electricity we use is for lighting and small appliances, such as TVs, VCRs and stereos. A good percentage of energy consumed by lighting and appliances occurs in the evening when families are home. By moving the clock ahead one hour, we can cut the amount of electricity we consume each day. Studies done in the 1970s by the U.S. Department of Transportation show that we trim the entire country's electricity usage by about one percent EACH DAY with Daylight Saving Time. Daylight Saving Time "makes" the sun "set" one hour later and therefore reduces the period between sunset and bedtime by one hour. This means that less electricity would be used for lighting and appliances late in the day. We may use a bit more electricity in the morning because it is darker when we rise, but that is usually offset by the energy savings in the evening. We also use less electricity because we are home fewer hours during the "longer" days of spring and summer. Most people plan outdoor activities in the extra daylight hours. When we are not at home, we don't turn on the appliances and lights. A poll done by the U.S. Department of Transportation indicated that Americans liked Daylight Saving Time because "there is more light in the evenings / can do more in the evenings." While the amounts of electricity saved per household are small...added up they can be very large. In the winter, the afternoon Daylight Saving Time advantage is offset by the morning's need for more lighting. In spring and fall, the advantage is less than one hour. So, Daylight Saving Time saves energy for lighting in all seasons of the year except for the four darkest months of the year (November, December, January and February) when the afternoon advantage is offset by the need for lighting because of late sunrise. A report was released in May 2001 by the California Energy Commission to see if creating an early DST or going to a year-round DST will help with the electricity problems the state faced in 2000-2002. You can download an Acrobat PDF copy of the staff report, Effects of Daylight Saving Time on California Electricity Use, Publication # 400-01-13, (PDF file, pages, 5.2 megabytes). The study concluded that both Winter Daylight Saving Time and Summer-season Double Daylight Saving Time (DDST) would probably save marginal amounts of electricity - around 3,400 megawatt-hours (MWh) a day in winter (one-half of one percent of winter electricity use - 0.5%) and around 1,500 MWh a day during the summer season (one-fifth of one percent of summer-season use - 0.20%). Winter DST would cut winter peak electricity use by around 1,100 megawatts on average, or 3.4 percent. Summer Double DST would cause a smaller (220 MW) and more uncertain drop in the peak, but it could still save hundreds of millions of dollars because it would shift electricity use to low demand (cheaper) morning hours and decrease electricity use during higher demand hours. The Energy Commission has also published a new report titled The Effect of Early Daylight Saving Time on California Electricity Consumption: A Statistical Analysis. Publication # CEC-200-2007-004, May 27, 2007. (PDF file, 592 kilobytes) In May 2001, the California state legislature sent a Senate Joint Resolution (SJRX2 1) to the White House and Congress asking that states be allowed to extend Daylight Saving Time year round. Congress and the White House did not act on the request because of the world-changing events of September 11, 2001. No new legislation has been passed in California since then. A more recent study - in draft form as of February 2008 - by Matthew Kotchen and Laura Grant of the University of Santa Barbara concludes that Daylight Saving Time in Indiana actually increases residential electricity demand. That study titled "Does Daylight Saving Time Save Energy? Evidence From a Natural Experiment in Indiana". (PDF file) looked at the electricity use when portions of the state finally started to observe DST. Before the new extended DST, portions of Indiana did not observe DST. Some have wondered whether this study would be true for the entire United States. Initial analysis by staff of the California Energy Commission says a similar study may not yield the same results for California because: * The use of residential air conditioning is relatively low in Indiana, and the saturations are low. Where as California has high usage of air conditioning in the summer. * Heating use is relatively high in Indiana, while it is relatively low in California. * The diurnal variation in temperature is low while California is very high. * Indiana is located in western edge of the same time zone as Maine and Florida, but the sun actually comes up at an earlier time than those other two states. * Indiana's north-south location will affect how long the days are in the summer and might very well lead to different results in different areas. So, while the analysis is of interest to Indiana, it's conclusions may not be totally correct for California or the rest of the country. Additional studies on electricity savings, the first national study since the 1970s, are being done by the U.S. Department of Energy, and more definitive results on DST on electricity use will be coming in the next year or two. But why do we have Daylight Saving Time to begin with? Who created the laws and regulations that we follow

Answer 4

I makes us realize how important it is to repeal laws that have become obsolete and harmful. The only purpose of the daylight saving law is to change the time that the sun rises. This forces to break the habit of going to bed 2 times each year which takes at least a week each time. If we do not go to bed by the clock then we increase the time that we may get the sleep we need while driving or operating a punch press. The result may be death or loss of a hand in the punch press.

Don Casey doncasey301@att.net

Answer 5

IT makes people get up early to do their job.