• @Thorny_Insight@lemm.ee
    link
    fedilink
    310 months ago

    Another thing that’s curious about these lights which also applies to your computer/smartphone display aswell is the fact that it’s able to produce yellow color despite only having red, green and blue leds in it. If you open up a yellow picture on your monitor and look closely with a magnifying glass there’s no yellow there.

    • @cheese_greater@lemmy.worldOP
      link
      fedilink
      110 months ago

      Thats another thing I don’t get. Itf you look at your tv screen real close its all red/green/blue. Every pixel/cell, how does it appear different from far away

      • Okay you really want to fuck with your mind, brown is not a color. You can’t not break down a rainbow and find brown anywhere in it. There is no such thing as brown light. Yet you can see it every day.

      • Classy Hatter
        link
        fedilink
        310 months ago

        Human eyes have three kinds of cells (photoreceptors) for color detection. They each react to either red, green or blue light. If more than one of those cells are activated, your brain interprets the light based on what cells activated, and how strongly they activated. If red and green cells activates, the light is seen as yellow. The light is seen as white if all of them activates fully.

        This also means that light bulbs can produce white light by simply producing three wavelengths (colors) of light. The problem with that kind of “fake” white is that colors will look wrong under such light due to the way how objects reflects light. This is very common with low quality LED lights, and even the best smart lights aren’t very good at it. When buying LED lights, you might want to look at the CRI (Color Rendering Index) value and make sure it’s above 90, or as high as possible.