Light and sleep – or why we (usually) sleep at night
Sleep usually happens at night. For our ancestors, there were very practical reasons for this. Artificial light was expensive, high maintenance, and not without danger. Also, it was too dim …
EU petition No 0362/2018 on the possible adoption of European legislation against light pollution
Please read the petition by Sibylle Schroer from Stars For All. She suggests to limit light emissions to sensible levels and conduct more research on light levels used in outdoor …
Is a 4000 Kelvin LED street light like the moon?
‘Let’s kill the moonlight!’ proclaimed the Italian poet Filippo Marinetti a few years after Edison’s incadescent lamp enchanted the world. With all our light pollution, we have been quite successful …
Night mode for LED displays – does it really work?
In today’s world, LED displays are omnipresent. We use them for computers, smart phones, e-book readers and television. And we use all these appliances until late at night, often …
Magic LED: Why our world gets brighter
So there has been another climate conference, where the powerful have discussed how to save our world. Main topic, was usual, is the CO2-production. Let’s be honest, most countries find …