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A comment on What Happened to the 100000 Hour LED Bulbs?. Parent comment

Re:What Happened to the 100000 Hour LED Bulbs? by Pheide1j on Wednesday February 06, 2019 @12:57PM (#19097684)
More of a non-technical question, do you see demand for outdoor lights at the red end of the spectrum?

Supposedly that's better for night vision, light pollution and various animals. But everywhere I go I see yellowish sodium vapor lights replaced with white LEDs.

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Re:What Happened to the 100000 Hour LED Bulbs? by darkmighty on Wednesday February 06, 2019 @04:01PM (#19099899)
I think it's a shame sodium vapor lamps are being replaced. Low pressure sodium (LPS) is actually highly efficient, provide a very soothing color for nighttime, and for me most importantly are easily filtered by astronomical observations (their spectrum is nearly a single line). Their size and unwieldiness is justified in utility street lightning setting.

http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?2001IAU...

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Re:What Happened to the 100000 Hour LED Bulbs? by phasetransition on Wednesday February 06, 2019 @03:31PM (#19099563)
We've certainly been asked about amber LEDs for coastal environment projects, so I think there is some demand. Amber LED performance, on the other hand, is a different story.

The lumens out of a legacy high pressure sodium lamp are very high. It is still an engineering challenge to get comparable lumens out of LEDs at price point the market will bear.

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