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#lighting

7 Beiträge7 Beteiligte0 Beiträge heute
Öffentlich
Dr. John Barentine FRAS

“Using photometric and spectroscopic sensors, we observed up to 50% night sky darkening during Earth Hour from 2011 to 2024 in Hong Kong, primarily as a result of a small but critical number of lights-out instances in central business districts, as evidenced by crowd-sourced photography records. The emission reductions mostly occurred in the 445–500, 500–540, and 615–650 nm spectral ranges---corresponding to peak emissions from LED billboard screens--- and in the 585–595 nm range, associated with metal halide floodlights used for facades and billboards. Our study identifies these sources as major contributors to urban light pollution.”

(Note: not yet peer reviewed, but the authors are legit.)

researchsquare.com/article/rs-

www.researchsquare.comUrban night sky is drastically lit up by a few decorative buildings: Natural experiments from Earth HourLight pollution, an underappreciated environmental issue, has gained attention in recent years. While controlling light pollution requires sustained efforts, Earth Hour offers a unique natural experimental setting to assess temporary lights-out measures.  Using photometric and spectroscopic senso...
#LightPollution#Cities#LED
Öffentlich
Niamh Bernadette (They/Them)
Amongst the Stars / Fra le Stelle

I was at the Teatro Anatomico (Anatomical Theatre) today! There's so much to say about it but we'll just concentrate on the ceiling right now. It was built in 1645 by Antonio Levanti. We have Apollo, the protector of medicine, in the centre and he's surrounded by 14 other constellations. Back in the day consulting the heavens was a pretty normal part of medicine. You know, mercury is in retrograde so we should amputate that toe.
Astrology and medicine were intertwined and every part of the body was associated with an astrological sign. The ceiling was a representation of the medicine of the time and also how the human body and the heavens above were intrinsically linked.
Also, huge thank you to the Arabic world and the Middle East because without their knowledge, ancient science and wisdom - we would not have modern medicine! ✨
This photo was taken from on top of the slab/operating table in the middle of the room.

#photography #amateurphotography #ceiling #medicine #history #statue #wood #bologna #travel #lighting #astrology #constellations #theatre #science #anatomy #architecture #italy #italia #citta #old #university #urbanarchitecture #travel #europe
#europe
Öffentlich
Dr. John Barentine FRAS

Jane Slade has an interesting article in the current issue of the IES LD+A magazine that suggests when it comes to outdoor lighting and security, we're asking the wrong question.

"I propose that the dangerously oversimplified question 'Is more light safer?' be distilled out of our discourse in the lighting industry. When we hear this question being asked, let us actively design the discourse, redirect the question, call out how it has typically created less quality in design, and elevate the conversation with other, more open-ended and truth-seeking questions"

journals.sagepub.com/doi/full/

#Lighting#LightPollution#DarkSkies
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