Is there an LED replacement/equivalent for Incandescent R80 Bulb (Spotlight style, Wide Beam, 100W, Warm White, Fully Dimmable)?

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  nocure on 12/08/2015 - 12:42

  Spotlight, Wide Beam,

  ?

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    morini on 12/08/2015 - 18:46

    Sorry, that means spotlight style, but wide beam.

    Like this: http://www.bunnings.com.au/philips-100w-clear-edison-screw-r… But I'd prefer a 120 degree beam angle.

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  endotherm on 12/08/2015 - 15:15

  +1

  Pretty hard to find everything you want, and it will be very expensive if you do. I haven't seen anything over 75W currently. They are still pretty bright. For some reason the warm whites I've seen aren't dimmable. Be aware that you will need a modern Universal dimmer to dim LEDs, the older ones don't work properly (they will strobe). Around $50 just for the dimmer plus electrician to install it.

  If you just want to change the colour temperature, just put a filter over it, e.g. from a circle cut from yellow cellophane, (Officeworks, art and craft shop etc.). Personally I have painted them with a more permanent and pleasing finish with Pebeo Porcelaine 150 Paint from Spotlight in the craft section. Normally you bake the item in the oven (at 150 degrees) to set it after you paint them but I haven't done an LED globe yet — it works fine "cooking" a standard globe. If you don't touch the glass after painting it, the natural heat from the globe should set it anyway. Just make sure you get a transparent colour, and use just a very light/thin coat, you don't need much. If possible thin it down first (they sell a special thinner too). I did my bedside lamps with this method and using standard globes — even the 15W warm glow was too harsh, so I "yellowed" them a bit more and it was much more pleasant and less disturbing in the middle of the night. Years ago before LED lights were available, I made my own by soldering white LEDs together. Unfortunately it was way too blue and daylight/cool. I found by changing 4 orange LEDs in 24 white produced a nice warm-white compromise. The lesson here is you only need to add a subtle amount of colour to change the colour temperature, otherwise you will have a coloured party-light!

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    morini on 12/08/2015 - 18:48

    That's an interesting approach. Thanks for the tips!

    edit: is there a way to tell whether a dimmer is leading or trailing edge?

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      endotherm on 12/08/2015 - 19:25

      +1

      You'll probably have to cross reference the part number with the manufacturers web page. e.g. HPM here There are a number of considerations, e.g. old wirewound transformer vs electronic types with halogen-style downloghts, fluorescents, incandescent, low-voltage/mains etc.