Dr. John Barentine FRAS
@JohnBarentine@scicomm.xyz
Astronomer. Historian. Author. Space environmentalist. Small business owner. Arizona native. Proud LGBT American. 🏳️🌈 Retiring to asteroid 14505. Questioning everything; occasionally getting in trouble for it. Toots about #Astronomy, #LightPollution, #DarkSkies, #Satellites, #SciencePolicy, #History and more.
scicomm.xyz
When cities transition to LED streetlights, the results can sometimes worsen urban skyglow. But it does not have to be that way. Our latest post compares three global cities that successfully modernized their public lighting while drastically reducing light pollution.
Tucson proved the value of reducing total lumen output to avoid the rebound effect. Vienna demonstrated that strict optical shielding and zero upward light can cut streetlight skyglow by 75 percent over a decade. Metz pioneered ecological spectral management, using ultra-warm 1000 K LEDs and smart sensors to protect river wildlife.
Learn how these three strategies create a blueprint for dark-sky-friendly urban lighting: http://www.darkskyconsulting.com/blog/tucson-vienna-metz-a-tale-of-three-cities
#LightPollution #DarkSkies #StreetLighting
#Queer 
#ActuallyAutistic♾️ Pronouns: They, them, per, person, human. #Environmentalist🌳 #DemocraticSocialist🌹 Student of #AncientHistory 📜 #NoNukes☢️ Anti#Oligarchy🎩 #NoWar☮️ #GetMoneyOut💰#HumanRights🕵️♂️ #FreePalestine🇵🇸 #BLM✊🏿 #IndigenousRights 🌿 #WaterIsLife💧Anti-#Corruption🔍 #ClimateCrisis🌍 #RightToRepair 🪛 #SolarPunkSunday 🌞
