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  • "full spectrum" daylight lamps / tubes etc. -

    ..looking for lamps (ideally T8 tubes) that mimic actual daylight, for painting images at home in the winter season.
    So it's not just about getting a bulb which is 5600K or whatever, but about getting something that delivers a "full spectrum".

    After quite a lot of googling I have found

    • these lamps seem to be expensive as fuck
    • these lamps seem to be needing a lot of energy (compared to regular tubes)

    Could somebody suggest some lamps that are moderately priced, maybe explain whether LED-based full spectrum lamps are actually working (and worth the money)?
    It's not about a little desktop lamp but rather giving light to a bigger workspace; so need about the equivalent of 2-4 regular T8 tubes.

    Thanks in advance for any help!

  • What you're looking for are High CRI leds. Colour Rendition Index. Not to be confused with the temperature 2800k, 3800k, etc.

    You should be looking for 95+ for CRI

  • After quite a lot of googling I have found

    these lamps seem to be expensive as fuck
    these lamps seem to be needing a lot of energy (compared to regular tubes)
    

    Yeah, that's basically a combination of physics and economics that you can't get around. You're always going to trade efficiency for colour fidelity, because LEDs and gas discharge lamps have their highest efficiency at one wavelength and then you have to do tricks to broaden and shape the spectrum. Since very few people are bothered once CRI goes above 50, and of those 90% will be more than happy once it hits >80, the market for any kind of lighting with super high fidelity (CRI>95) is small and can only be served by specialised products which are inherently more costly to produce than simple basic ones, regardless of economies of scale.

    You can get full spectrum fluorescent T8 (CRI=98) for about a tenth of the price of equivalent LED, and although they are only half the efficiency of LED, you can still buy quite a few kWh for the difference in capital cost. LEDs have other benefits besides just higher efficiency, but they are not really relevant to lighting a painting studio,

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