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  1. #31

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    I bought some halogen bulbs today. After a quick comparison they seem closer to daylight than my cfl or incandescent bulbs, in terms of colour rendering.

    Ikea is the same everywhere. Besides ikea I bet there are other decent bulbs available in the us.

  2. #32
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    There is a complete review of Tungsten, CFL and LED lights in this months Popular Mechanics (September). It rates cost, longevity, spectrum and impact on color reproduction. This should answer a lot of your questions.

    PE

  3. #33

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    Some of the problem is with semantics. I think a lot of queries are related to simple screw-in CFL's which
    are intended as low-energy replacements for residential tungsten bulbs. This is an entirely different topic than expensive studio lighting or things using high-frequency ballasts like Broncolor, for example,
    offers. There are some basic laws of physics why no fluorescent bulb can ever completely duplicate the
    continuous spectrum of daylight or a filament bulb, though some can simulate it reasonably well. My own
    color matching tubes came from Germany and have a CRI of 98, but still aren't quite as accurate for color matching, copy work, or display as a color-temp filtered old-style bulb. Plenty of studies have been
    done on this. Let's just hope things keep improving as the market demands better color rendition for
    certain applications. I've recently did a big commercial installation of 30X40 Crystal Archive prints under
    CFL's, which did an acceptable job of rendering the color, but nonetheless gave me a bad headache anyway from the discontinuous spectrum, while I was hanging them. In this case, the city code required
    low-energy CFL's well ahead of the national mandate.

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