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The LED's Challenge to High Pressure Sodium

Technology Connections · 1.6M views · 2018-06-19 · 21:40

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Overview

A Technology Connections video weighing LED streetlights against high pressure sodium lamps, covering efficiency, color, cost and light pollution. It is a follow-up to his earlier explanation of why street lights are orange.

On Hacker News

HN commenters point to it in lighting threads for its pros and cons of LED versus sodium lamps, though one calls it almost right.

Recommended by 2 HN people across 2 months · HN mentions 2018–2021

Topics

Everyday physics & science demosPower grid, heating & buildingsRenewables, batteries & storage
Search by tags
ledhigh pressure sodiumstreet lightslight pollutioncolor temperature

What people said

kibwen · 2020-08 · Recommendation

Here's a quite good video about the pros and cons of LED vs high/low-pressure sodium street lamps: [VIDEO] . It goes into lamp efficiency, how our eyes see differently at night, response time under different sorts of light, color temperature, circadian rhythm disruption, and light pollution.

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news_to_me · 2018-08 · Recommendation

The youtube channel Technology Connections has a couple of interesting articles about LED (and sodium-vapor lamp) bulbs in street lighting: [VIDEO] (Actually, most if his videos are pretty interesting to explore, especially the ones about early TV)

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jedimastert · 2021-03 · Reference

I'm reminded of a Technology Connections video about what happened when his town switched from incandescent to LED stop lights < [LINK] > Of course, while I was looking that up I found out he made a video about sodium vapour lights! < [VIDEO] >

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Sources

Video by Technology Connections, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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