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The LED Traffic Light and the Danger of "But Sometimes!"

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Further reading 1

If it plugs in, does it really connect? →Chargers, seals, differentials and a handheld’s ports all fit. Follow the current, heat and force to see what actually crosses the interface and which conditions the specification leaves out.This video helps answer · Was waste heat part of the traffic light’s job?

Caption notes

The waste heat of an incandescent traffic light also melted snow. A replacement LED can meet a brightness target yet be obscured in certain storms. The presenter examines a design that controls heating separately from lighting.

Archived captions (transcription method unspecified) ↗
Original passages · 2
keeping snow and ice from building up
The LED Traffic Light and the Danger of "But Sometimes!" · ▶ 5:49–5:54
sensors onboard measuring temperature and humidity
The LED Traffic Light and the Danger of "But Sometimes!" · ▶ 10:24–10:28

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