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Efficient Energy Usage: Light Bulb On 10s Continuously vs. On/Off Every Second for 10s

KABAN_DG 31768 18
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 6580383
    KABAN_DG
    Level 15  
    Hello,

    such a question came to me. Will turning the light bulb on for e.g. 10s (continuously) consume less energy than turning it on and off every second for 10s.
    Maybe a stupid question, but I have a habit of turning the light on and off right away and I have had my head dried more than once that if for a while it is better to leave the light on than to shoot constantly.

    Thanks in advance

    Greetings
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  • #2 6580417
    Robewit
    Level 26  
    Theoretically, it will draw more energy because more current flows through the filament when the bulb is turned on. The second thing is the life of the bulb, in such conditions it will be shorter.
  • #3 6580618
    Soprzemo
    Level 17  
    Kidys had such a program on TV
    it's better to leave the light on than to turn it off every few minutes.
    And they just said that such switching on and off more electricity will wear out than if you leave the bulb alone.
  • #4 6580801
    Futrzaczek
    VIP Meritorious for electroda.pl  
    During the start, the bulb draws as much energy as for 0.5 seconds of lighting. Another issue is its service life ...
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  • #5 6583206
    Anonymous
    Anonymous  
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  • #6 6583413
    Bicker1
    Level 19  
    An interesting theory of sapper44 - you may not get a Nobel Prize for it, but who knows, maybe another prize will be found.
    The light bulbs, however, are probably most often lit when turned on.
  • #7 6583508
    Anonymous
    Anonymous  
  • #8 6583702
    Elektrooonik
    Level 29  
    Soprzemo wrote:
    Kidys had such a program on TV
    it's better to leave the light on than to turn it off every few minutes.
    And they just said that such switching on and off more electricity will wear out than if you leave the bulb alone.


    I would like to see this program.

    If lighting a bulb for a few minutes is as energy-consuming as lighting it within 0.5s (sample time), does it mean that a 100W bulb pulls a current on average a few hundred times greater during start-up? that is, instead of 0.5 A rated several hundred amps?

    Energy [Ws] = Power [W] * Time [s] think about how to apply this formula to answer the question asked in the first post :!:
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  • #9 6583795
    Anonymous
    Anonymous  
  • #10 6583858
    Elektrooonik
    Level 29  
    In my opinion, the topic is not worth discussing.
    The only issue worth considering is the lifetime of such a light source depending on the number of switching / disconnecting cycles.
  • #11 6583913
    Anonymous
    Anonymous  
  • #12 6584225
    bodek18
    Level 12  
    Hello
    and I watched a program that explained that lighting bulbs every now and then does not consume more energy, and certainly not such that it is worth leaving the bulb on. And the show is called Braniac and it's on Discovery ;) .
  • #13 6584284
    Chris_W

    Level 39  
    It is definitely not worth treating fluorescent lamps (tubes) like this ...
  • #14 6584473
    KABAN_DG
    Level 15  
    Hello,

    I can see that it is a little-important topic and what kind of brainstorming it caused.
    Thanks everyone for clearing up this point.

    Regards
  • #15 6584546
    jozefg
    VIP Meritorious for electroda.pl  
    I installed a motion sensor in the corridor at home, delay of about 15 seconds.
    I have the same done in front of the house in the backyard.
    Of course, the sensors are set so that the lighting does not turn on during the day ... :)
  • #16 6584749
    c4r0
    Level 36  
    sapper44 wrote:
    And when switching off, a flashover occurs on the contacts of the switch and the current of this spark often borders with the strength of the bulb and therefore the bulbs burn more often when switching off.
    Maybe you could explain it somehow? Because in my opinion, if any spark (arc) arises when disconnecting the contacts, it can only reduce the current.
  • #17 6584768
    Elektrooonik
    Level 29  
    c4r0 wrote:
    sapper44 wrote:
    And when switching off, a flashover occurs on the contacts of the switch and the current of this spark often borders with the strength of the bulb and therefore the bulbs burn more often when switching off.
    Maybe you could explain it somehow? Because in my opinion, if any spark (arc) arises when disconnecting the contacts, it can only reduce the current.

    Depends on how he jumps ;) The whole topic is not worth discussing so much, and the posts quoted above should be thrown into the bin instead of being the subject of deep scrutiny.
  • #18 6585252
    airbites
    Level 22  
    I checked how much power it consumes, switched on and off, e.g. for 5 minutes and it cannot be seen that it consumes more, it is the same. and energy-saving is different. At the beginning, it charges less and then slowly increases to e.g. 11W and when turned off for 5 minutes. and it turns on it will immediately be 11W.
  • #19 6585818
    gruby1
    Level 29  
    The bulbs should definitely be turned off. The case is different for fluorescent lamps - here the costs are higher, because the service life with continuous switching on and off decreases drastically. It is true that there are also light bulbs, but the price of a bulb is 1/20 of the price of a fluorescent lamp. BTW. Mythbusters charged it for us, so we don't have to do it at home. :D
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Topic summary

The discussion centers around the energy consumption of light bulbs when comparing continuous operation for 10 seconds versus turning them on and off every second for the same duration. Responses indicate that turning a bulb on and off frequently may lead to higher energy consumption due to the initial surge of current during startup, which can be equivalent to the energy used in a brief period of continuous lighting. Additionally, frequent switching can reduce the lifespan of the bulb, particularly for fluorescent lamps, which are more sensitive to cycling. Some participants referenced a program that suggested leaving the light on is more energy-efficient than frequent toggling. Overall, the consensus leans towards minimizing on/off cycles for incandescent bulbs, while cautioning against the practice for fluorescent lamps due to their higher operational costs and reduced longevity.
Summary generated by the language model.
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