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Science

hunter

(38,303 posts)

9. How long until cities are LED white instead of high or low pressure sodium orange?

Reply to n2doc (Original post)

Thu Feb 21, 2013, 10:35 PM

Feb 2013

The place where I grew up started out with soft white incandescent streetlights, then it was hideous mercury vapor lights that gave everyone a deathly blue-gray pallor, then it was high pressure sodium, and now I'm beginning to see LEDs in some places.

It's crazy how we've lit up the place.

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Orbit [View all] n2doc Feb 2013 OP

Wonderful video, and thank you! CaliforniaPeggy Feb 2013 #1

Beautiful, n2doc! Control-Z Feb 2013 #2

Stunning krispos42 Feb 2013 #3

That was interesting 2naSalit Feb 2013 #4

stunning... kardonb Feb 2013 #5

Very cool images, but... nikto Feb 2013 #6

X-L-N-T!! lastlib Feb 2013 #7

What a ride! DhhD Feb 2013 #8

How long until cities are LED white instead of high or low pressure sodium orange? hunter Feb 2013 #9

Wow. The aurora borealis from space what an amazing sight. nt SunSeeker Feb 2013 #10