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  1. V

    Running incandescent or halogen bulb with 2/3 or lower voltage possible?

    Thanks, Yes the question is if you imagine a spectrum for a halogen bulb going from infrared through visible to uv. I would like to shift the entire spectrum downwards by lowering the voltage by a fairly large amount. You can't really buy incandescent bulbs anymore here and I haven't had much...
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    Suitable material to filter UV out of halogen lamp

    Ok thanks.
  3. V

    Running incandescent or halogen bulb with 2/3 or lower voltage possible?

    Can I drive a halogen or incandescent bulb with significantly lower voltage to achieve a lower colour temperature? I'm guessing I can with an incandescent but can I with a halogen, or will it not work properly?
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    Suitable material to filter UV out of halogen lamp

    Thanks, looks good. I just also wondered if there was a simple diy alternative (it doesn't have to be perfectly clear).
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    Suitable material to filter UV out of halogen lamp

    Well according to this example I found quickly it would have to filter up to 200nm, it could filter down to violet or blue or even to about 500nm approx. but this could vary. Ok just read the second post. Maybe I'll just buy one with a filter already. Thanks.
  6. V

    Suitable material to filter UV out of halogen lamp

    What materials could be used to filter the UV light out of halogen light but pass all the lower wavelengths? Could salt work?
  7. V

    Material to filter ozone but pass ions?

    Ok thanks, I read that ions last longer than ozone (although still not very long). So I guess the solution is the distance it is placed away. Although I'm not sure how to work it out so I'm just putting it on the edge of the room.
  8. V

    Material to filter ozone but pass ions?

    Is there a material I could put an ioniser inside of that would filter out any small amount of ozone but allow all the ions to pass?
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    Has anyone experienced different colour room lighting, if so which colour did you prefer?

    Has anyone experience being in a room lit with different colours (one at a time). If so which did you find best or was one good some time and another one at another time?
  10. V

    Will a lightbulb inside a ceramic cube generate far infrared?

    lol too difficult, I was thinking more of a box chair with walls and roof maybe.
  11. V

    Will a lightbulb inside a ceramic cube generate far infrared?

    Ok thanks. In that first article on thermal radiation it said that a person can reabsorb most of the radiation they loose through bouncing back off of furniture, walls etc. I have a chair with open sides, what would be a good material I could attach (ie. screw on) to the sides in winter to...
  12. V

    Possible to have safe low density infrared leds in board?

    Sorry I edited my post to explain more including a link to the sort of thing I am talking about. I know you are not really going to get hot in a noticeable way from low powered leds but I read that there can be other benefits from a small amount of ir 'heat'. But I just want to know is there...
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    Is it possible to stimulate a tourmaline crystal to release ions or far infrared

    Is this a silly question? Here are some
  14. V

    Possible to have safe low density infrared leds in board?

    Look at things like this. http://www.elixa.com/light/arrays.htm I think these are designed as direct contact use but could you put a mix of very low power infrared leds and red ones in an above head type lamp that you could sit underneath (since light travels in a line)? Where you wouldn't be...
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    Best wall power supply for automotive 12v 1w ioniser module

    Yes it was with no load with the 12v supply test. I just tested it under load it was drawing about 20ma and the voltage was 12.2 with the 9v plug pack and you can feel the ionic wind on your tongue lol. It uses 2x carbon fibre wires cut at the end to form brushes. I assume one is the emitter...
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    Best wall power supply for automotive 12v 1w ioniser module

    The plug pack power supply I have is 150ma (meant to be 12v) but it's producing 19v. The ioniser is 12v with maximum of about 80ma current draw (I think). Would the 19v be too high for a device meant for use in a car?
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    Possible to have safe low density infrared leds in board?

    I have a computer program called flux and redshift that makes the screen redder in the evening so I ordered some red leds to simulate it with room lighting. I wondered about adding a little bit of infrared to winter lighting to make it seem more natural (ie. like halogen lighting or...
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    Why are halogen ovens more efficient than regular ovens?

    Ok thanks, so there is no technology difference like there is with microwaves that would make them more efficient, just their size and shorter preheating time and other factors.
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    Will a lightbulb inside a ceramic cube generate far infrared?

    So if you were to put a heating element inside a ceramic material you would call both infrared but the ceramic would lower the frequency compared with the bare element?
  20. V

    Why are halogen ovens more efficient than regular ovens?

    Oh there is a lot of marketing etc. saying they are more efficient. ie. "Reports often claim halogen ovens have shorter cooking times than conventional ovens, with one report stating a figure of up to 40% faster,[2] but 20% faster on average.[4] Another report claims a halogen oven cooks food...
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