Meanwhile, my neighbors are all doing their best to recreate daylight brightness all through the night with flood lights in their driveways, begging for ever brighter street lights, etc.
I feel like more than half the population would truly end nighttime if given the opportunity.
* https://www.darksky.org/our-work/lighting/lighting-for-indus...
My street has a very similar design, I wonder if it's compatible with what you're saying, maybe just not certified.
* https://www.lrc.rpi.edu/programs/nlpip/lightinganswers/light...
* https://www.lrc.rpi.edu/programs/nlpip/lightinganswers/light...
There are standards (RP-33-99, RP-2) from folks like:
* https://en.wikipedia.org/wiki/Illuminating_Engineering_Socie...
* https://energycodeace.com/site/custom/public/reference-ace-2...
* https://www.shine.lighting/threads/122/
* https://www.denvergov.org/files/assets/public/doti/documents...
IES TM15 11:
* https://www.youtube.com/watch?v=EVPbuq4g5W4
* http://www.escolighting.com/PDFfiles/BUG_rating.pdf
Generally you don't light to illuminate more that 60˚ from the nadir of the lamp:
Permanent daylight really makes life a LOT better.
And near me that seemed to mean they also need to be cool white LEDs (which, being more efficient than what they replaced, will be run brighter) tilted slightly upward so they shine both into the sky and second story bedrooms.
But my city keeps insisting on installing the blinding cool LEDs that cast everywhere! I don't get who thinks these look good, except that some people associate the cool temperature = modern.
Then again, when I walk around at night, I see a lot of houses and apartments lit up with wildly different bulb temperatures, or cool color temperatures in their living rooms. It would drive me crazy but it's possible some people don't notice these things.
Anyone knows where the cool/warm terminology comes from?
And yeah I hate when my bulbs aren't matched. It already annoys me that I can't exactly colour match my IKEA RGB bulbs with the warm/cool ones. They just won't do the exact same hue.
Color temperatures over 5000 K are called "cool colors" (bluish), while lower color temperatures (2700–3000 K) are called "warm colors" (yellowish). "Warm" in this context is an analogy to radiated heat flux of traditional incandescent lighting rather than temperature. The spectral peak of warm-colored light is closer to infrared, and most natural warm-colored light sources emit significant infrared radiation. The fact that "warm" lighting in this sense actually has a "cooler" color temperature often leads to confusion.
That's a deliberate choice for me. I have colour temperature adjustable lighting, and prefer the cooler temperatures (~6500k), particularly when reading.
I'm referring to when I'll see a dim warm yellow bulb in a lamp, with the most sterile cool bulb in a ceiling fixture, all in the same room.