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    #31
    Originally posted by northernladuk View Post

    Oddly fluorescent tubes aren't the worst as they are only rated 15W to 36W. The LED tubes are anywhere between 9w and 40w and are more expensive to buy plus possible cost to retro fit so I'd imagine most places won't be in a rush to swap them out.

    It's the individual 60-100w bulbs is where the savings really are.
    Look at the lumen (how bright it is) to watt (how much power it uses) LEDs normally have a far better efficiency. Technically they should last longer if the driver is designed properly, there is less dimming over time and LEDs don't contain significant amounts of Mercury. Add in the ability to pick a wide range of colour temperatures there are few reasons to use fluorescent lighting .
    "If you didn't do anything that wasn't good for you it would be a very dull life. What are you gonna do? Everything that is pleasant in life is dangerous."

    I want to see the hand of history on his collar.

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      #32
      A while ago I came across this interesting talk and dissection of the Dubai Lamp https://www.youtube.com/watch?v=klaJqofCsu4

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        #33
        From the article

        LED lights last five times longer than traditional halogen bulbs and produce the same amount of light, but use up to 80% less power.
        I'm all for it, provided the LED lights are bright and can deliver "daylight" 6000K colours (which I know they can), don't flicker noticeably, and are dimmable

        And aren't made in China, or with rare earth elements the Chinese have cornered the market in!
        Last edited by OwlHoot; 10 June 2021, 10:00.
        Work in the public sector? Read the IR35 FAQ here

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          #34
          Originally posted by DoctorStrangelove View Post


          I've got boxes and boxes of proper tungsten light bulbs and CFLs by the dozen from the last time this nonsense happened.
          What you need are not LED bulbs but LUDD bulbs

          IGMC
          Work in the public sector? Read the IR35 FAQ here

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            #35
            Well there's a thing:

            https://pubs.usgs.gov/sir/2012/5215/...r%20technology.

            Metals such as arsenic, gallium, indium, and the rare-earth elements (REEs) cerium, europium, gadolinium, lanthanum, terbium, and yttrium are important mineral materials used in LED semiconductor technology.

            Most of the world’s supply of these materials is produced as byproducts from the production of aluminum, copper, lead, and zinc. Most of the rare earths required for LED production in 2011 came from China, and most LED production facilities were located in Asia.


            https://www.photonics.com/Articles/M...ed_LEDs/a58091

            LED lamps are manufactured with a variety of materials, including glass or plastic for the housing, ceramic or aluminum for the heat sink, copper for the resistors and cables — and more expensive elements such as indium and gallium inside the semiconductor diode, and rare earths such as europium and terbium in the phosphor material.
            Well, there's another thing.
            Last edited by DoctorStrangelove; 10 June 2021, 12:27.
            When the fun stops, STOP.

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              #36
              Originally posted by _V_ View Post
              As long as you avoid the unbranded super cheap Chinese marketed crap, LED bulbs I have do not flicker in any visible way, are super bright (too bright in some cases) and last many years before replacement. Why anyone would use anything other than LED is beyond me, and govt should have banned anything using more than 5w power years ago.

              Be glad when all heating and lighting is super low energy and from renewables only. Anyone who is thinking of joining XR anyway, deserves to be put to sleep.
              FTFY

              Campaigning to raise awareness about climate change is one thing. XR are just an excuse for a bunch of anarchists to cause trouble and damage property.
              Do what thou wilt

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                #37
                Originally posted by Dark Black View Post

                FTFY

                Campaigning to raise awareness about climate change is one thing. XR are just an excuse for a bunch of anarchists to cause trouble and damage property.
                Whereas you are advocating for their murder. Now who's being extreme.
                Originally posted by MaryPoppins
                I'd still not breastfeed a nazi
                Originally posted by vetran
                Urine is quite nourishing

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                  #38
                  I'm not a fan of LEDs. Had several lots installed in bathroom, kitchen and elsewhere in the last 4-5 years. The first lot were not very impressive, the supposed 'warm' light was anything but. My wife hated them.

                  We had ones put in our bathroom about 3 years ago and most failed within a few months. Had new ones put in again 18 months ago and that time the 'warm' lights were just about acceptable. However, half failed within a few months.

                  Meanwhile I've had halogen bulbs last 14 years and are still going and the light is much more preferable.

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                    #39
                    Originally posted by d000hg View Post

                    Whereas you are advocating for their murder. Now who's being extreme.
                    As you well know, I'm paraphrasing _v_ who I believe was advocating the murder of everyone else.
                    Do what thou wilt

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                      #40
                      Oddly enough, the enemy of semiconductors & electronic components, Specifically In General, capacitors, is heat.

                      Whilst the halogen spot is remarkably unconcerned that it's running at 150 deg C in the fitting, the electronic replacement gets very upset by this and dies.

                      Not helped by what passes as a heatsink being at the top of the device in that sort of fitting.

                      Much the same sort of thing kills CFLs in enclosed fittings.
                      Last edited by DoctorStrangelove; 10 June 2021, 19:31.
                      When the fun stops, STOP.

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