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

Re:$30 Homebrew Automated Blinds Opener by 05 on Monday May 19, 2025 @03:37AM (#44027359)
Indoor lighting is about two orders of magnitude dimmer, you’d need 1kW/m*2 (100W/sqft) to emulate a cloudless day at noon, so 20kW just to light up your living room, not accounting for LED losses.
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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.
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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.

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Re:$30 Homebrew Automated Blinds Opener by TimByte on Wednesday May 21, 2025 @04:46AM (#44049527)
No wonder a walk outside wakes you up better than a pot of coffee
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