eupolicy.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
This Mastodon server is a friendly and respectful discussion space for people working in areas related to EU policy. When you request to create an account, please tell us something about you.

Server stats:

214
active users

#LED

1 post1 participant0 posts today

#Skyglow reductions observed during #EarthHour in #HongKong imply that #LED billboards and building façade lighting are "major contributors to urban light pollution."

nature.com/articles/s41598-025

NatureNatural experiments from Earth Hour reveal urban night sky being drastically lit up by few decorative buildings - Scientific ReportsLight pollution, a typically underrecognized 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 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. Weekend lighting pattern in the city during Earth Hour remained unaffected. 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. By combining multimodal observations, we offer a comprehensive assessment of light pollution sources and the potential benefits of sustainable lighting practices in urban environments. This research highlights the importance of targeted light pollution mitigation efforts and provides critical insights for policymakers to enhance urban sustainability and human well-being.

Solo vengo a decir que si no escribo mucho y no aparezco por acá, es porque estoy escribiendo la tesis fuerte, o complicado con el laburo. También vine a decir que los focos LED esos blancos que les ponen a los autos ahora, no a los eléctricos, a los autos más viejos, con los porta lámparas que están pensados para las de filamento, cagan todo y encandilan 4 veces más, no sean terrajas. Déjense de joder y vuelvan a las lámparas halógenas. Los autos eléctricos tienen otro diseño en los difusores, encandilan un poco menos (solo un poco) pero al ser tan puntuales los LED parece que te están haciendo guiños con las largas todo el tiempo. Si no me voy a poner una lámpara en el techo yo y voy a empezar a devolver los encandilazos a diestra y siniestra #yameiba #autos #led