• Aceticon@lemmy.dbzer0.com
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      6 days ago

      The most energy efficient kind of light emitting semiconductor junction is the one that emits blue light.

      This being a battery bank and assuming that 2x7 segment LED display is always ON, maybe the choice of color for it was driven by that (and price, since that numerical display is far cheaper than even lower power solutions like e-ink) above usability.

    • chiliedogg@lemmy.world
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      7 days ago

      Blue LEDs were a technological breakthrough that took decades of work to create and enabled pretty much all modern tech.

      • go $fsck yourself@lemmy.world
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        7 days ago

        Blue LEDs are great for when you need something blue in particular, but the color is piercing and way too bright. Then they are used as the default without any consideration for any other color.

        They are shitty in how they are used, rather than their individual abilities and functions.

        • fallingcats@discuss.tchncs.de
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          6 days ago

          The brightness is too bright, not the color. The brightness is always a choice by the manufacturer they could easily make it dimmer using the exact same components.

      • go $fsck yourself@lemmy.world
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        7 days ago

        That doesn’t change the fact they are used in situations where they shouldn’t. I don’t like being blinded by a bright piercing blue light all the time.

        • Aceticon@lemmy.dbzer0.com
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          6 days ago

          All the “whites” (warm white, natural white, cold white and so on) on led lights are combinations of red + blue light emitting junctions covered in a phosporous mask to “smooth” the spectrum distribution of the resulting light (otherwise the light would be purelly a peak at a very specific wavelength on the red part of the spectrum and a similar peak on the blue part of the spectrum).