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A comment on $30 Homebrew Automated Blinds Opener. Parent comment

Re:$30 Homebrew Automated Blinds Opener by adrianN on Monday May 19, 2025 @04:52AM (#44027756)
You can get away with less because a good part of the power is outside the visible range.
[ Parent | on HN ]
Re:$30 Homebrew Automated Blinds Opener by bitdivision on Tuesday May 20, 2025 @04:24AM (#44039132)
Apparently 42% is visible! Less than I expected.

So around 470 W/m2 visible radiation.

[ Parent | on HN ]