A l’occasion de la Nuits des étoiles, l’Observatoire national de la biodiversité (ONB) publie un bilan actualisé de l’indicateur de pollution lumineuse en (...)

Here is the file with my latest article on healthy artificial lighting as an excerpt from LpR 111 for easier handling.

Light: Part Two — The Biology of Bulbs (TL;DR version)

When incandescents disappeared, we didn’t just lose warmth.
We lost the red and infrared wavelengths that signalled repair to our cells.
LEDs gave us efficiency — but stripped the balance.

Here’s what matters:
• Wavelength → tells your mitochondria to repair or defend

• Dose → decides if light is strong enough to shift biology

• Timing → sets circadian rhythm, sleep, and metabolism

Blue light isn’t the villain.
In the morning it sets the clock, boosts dopamine, and sharpens alertness. It impacts metabolism.

But alone, or at night, it distorts: raising glucose, disrupting leptin, flattening dopamine tone, and keeping the nervous system on alert.

Light is an orchestra. Without red, infrared, and ultraviolet, most homes are playing noise, not music.

Small fixes help: circadian bulbs, amber lamps, red lights in bedrooms, blue blockers.
But the future is biological coherence in architecture — spaces that nourish at the cellular level.

Here’s the visual summary 👇
Full deep-dive is still on Substack.

The Astroholic is a science blog run by Dr Alfredo Carpineti

Cities like El Paso and Midland are expanding and so is their light pollution.

Astronomers warn: unchecked lighting may rob the Southwest of its most iconic skies.

Growth shouldn’t mean glow.


 https://lnkd.in/g_2Z5qSu
 https://lnkd.in/gigRyWRa

#DarkSkyTexas #UrbanSprawl #LightPolicyNow #TexasNights #SkyFade

Terminé les lampadaires obsolètes et énergivores : la Ville de Narbonne lance "Narb’ON", un vaste programme de rénovation de son éclairage public sur neuf ans.
Objectif : améliorer la performance énergétique, valoriser le patrimoine urbain et fluidifier la circulation grâce à des équipements connectés et intelligents.

📷 Le projet de mise en lumière des quais de La Robine
© ON, Agence de Conception Lumière

Source : L'Indépendant du Midi
https://lnkd.in/egCDbGAK

Urban Lighting for Health & Wellbeing – first revealed at the LUCI Summit in London – is now available to download! 🔽
 
Developed through the EU Horizon 2020 ENLIGHTENme Project with 22 partners, these Guidelines empower cities to rethink lighting policies for better health and sustainability.
 
💡 Designed to raise awareness among decision-makers, the document shows how lighting impacts public health – especially for older adults – and calls for a more inclusive, knowledge-based approach to urban planning.
 
With these Guidelines, you’ll get concrete, actionable recommendations to ensure lighting is no longer treated as an isolated technical issue – but recognised as a key element in designing people-centered cities. 🏙️
 
👉 Download now: https://lnkd.in/ebXg_NYY
👉 Learn more about the project: https://lnkd.in/ejJpwEFZ

#ENLIGHTENme #HorizonEU

Satellite images showing the Earth illuminated in artificial light are becoming a glaring symbol of ‘light pollution’.

✨ Summer nights. 80% of the world's population can't see the Milky Way due to light pollution.

Let's preserve the nights. Eclatec offers decorative and street lighting solutions that are Dark Sky Approved: designed to reduce glare, protect wildlife, and bring light only where it's needed, protecting the beauty of our sky!

Thoughts to David L Crawford (1931-2024), founder and Executive Director of the International Dark-Sky Association (now DarkSky International) for approximately 20 years, as he traveled around the world fighting light pollution and advocating quality nighttime lighting.

Discover more about us: https://lnkd.in/dfYDfviZ

#eclatecinternational #urbanlighting #lightpollution #streetlighting #darksky

The council on Tuesday heard from officials and experts about Pittsburgh's dark sky efforts, aimed at tamping down on light pollution and saving money.

Michele Acuto Alessio Kolioulis Andreina Seijas join together for a practical walking roundtable.

I wrote an article about street lighting and crime. Very interested in your thoughts. | 11 comments on LinkedIn

Norfolk, VA Pauses Switch on Streets to LED over Complaints

https://lnkd.in/gYkv78sm

Citizens for Responsible Lighting is a local group advocating city council and Dominion Energy for dimmer, warmer lighting options on streets has achieved some success.
While 9,000 or 30,000 fixtures have been swapped for bright, blue-rich SSLs, the utility is now working to find something at 2700K with zero uplight.

#streetlighting #LED #lightpollution

Face à la recrudescence des incivilités en centre-ville, la municipalité a décidé, mardi 13 mai, de réactiver l'éclairage public toute la nuit sur le secteur.

🚨🗞 Our #July Newsletter is here🚨🗞

We are thrilled to share the (ongoing) global impact of the 8th edition of UNESCO #lightday2025!🌍✨

📊 By the Numbers
✅ 450+ inspiring events held
✅ Across 59+ countries and worldwide
✅ 125,000+ participants engaged, at both targeted local and national levels
✅ Covering themes from science and photonics to art, education, health, energy, culture, and more!

🌟 Our committed volunteers, event organisers, partners and sponsors are at the heart of this worldwide impact and success! A huge THANKS to everyone who organised events for inspiring many about the science of light and its impact on society and to those who participated in the global celebration.

🗞 Dive into our July newsletter for event highlights, and inspiration:
👉 https://lnkd.in/ed2YTEQu

Until #lightday2026!

[background ai generated image from pixabay]

Sécurité, confort visuel, bien-être, économie d'énergie, respect de la biodiversité.
Toutes les valeurs de l'éclairage résumées dans cette vidéo.

💡FastClimat, notre application développée pour la Ville de Paris pour moderniser son éclairage public

Dans le cadre du projet I Light Paris, le groupement formé par Dalkia Electrotechnics et nos équipes Eiffage Énergie Systèmes, sous le nom de Cielis, s'est engagé à remplacer les 70 000 sources lumineuses énergivores de l’éclairage public de la Ville de Paris par la technologie LED.

L'objectif, optimiser l’éclairage public de la ville tout en s'alignant sur les ambitions du plan Climat de Paris que sont réduire la pollution lumineuse, diminuer les émissions de carbone et réduire la consommation d’électricité due aux éclairages publics. 🌱

Chargées de la mise en œuvre des nouvelles lanternes de la Ville de Paris pour Cielis, nos équipes ont développé l’application FastClimat. Le but de cette solution connectée ? Suivre l’avancée des travaux de remplacement sur le terrain en temps réel et remonter à Cielis le nombre de lanternes et de coffrets remplacés chaque jour.

Outil numérique de gestion des marchés à performance énergétique (MPE), l’application FastClimat a permis d’améliorer la performance globale du marché avec une cadence affichée de 6 000 luminaires remplacés en moyenne chaque année. 🎯

Félicitations aux équipes pour avoir développé cette application pour Cielis, désormais duplicable.👏

#ÉclairagePublic #Application #Paris #Énergie Cielis - I light Paris Ville de Paris