The wavelength has negligible effect on shadow geometry (yes, there is chromatic aberration, refraction, interference but those are very minor in normal lighting, you need special prisms, tiny slits and perhaps lasers to really observe them). What do you even mean?
Also, sunlight (6000K) and daylight (6500K) is pretty much the same color because direct sunlight is >90 % of daylight (the rest is the blue sky and white clouds).
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It does not help that some people pronounce LED as “led”, or “ice” in Slavic languages. And “led lampa” is a homonym of “letlampa” (bunsen torch).
I’m not saying it’s a bad idea, I have a red bulb too. It’s “handmade” by removing thick red rubber from a “golf ball” decorative 7W CFL and stretching it over a similarly-sized 6W 2700K LED that has instant start and higher light output (not to mention, the taut rubber won’t send glass ball shards into a mercury-vapor-filled tube if it happens to fall). It is not as monochromatic as pure red LEDs, I think it’s close to what the phosphor-based red ones emit (with a lower efficiency of course since I discard the blue and green while they turn almost all blue into red and no green) and those are marketed as cicardian too. I have to avoid looking straight into it though: the pupil is wide open because rods don’t react strongly to red light so long-wavelength (red) cones get massively overloaded and I see a green spot for a while.
The difference is not as pronounced as in the picture. If you’re used to 4000K as neutral white, yellowish white is 3000K, amber-ish white is 2700K. Only below the temperature of fire (cca 1500K) is when blue fully disappears and you get actual orange or red. And pure yellow is not a possible black body (incandescence) spectrum (that is, it does not correspond to any color temperature) so even though you can set an RGB bulb to that, buy monochromatic yellow LEDs or go under a low-pressure sodium vapor lamp, such lighting feels unnatural.
Warm white is usually 1800 K to 3000 K. What you showed is less Kelvin than the color temperature of fire (1500 K). We don’t have a color temperature word for that, but “red” works. Of course, such light has no blue component (helps control the cicardian cycle) and is pretty much monochromatic with CRI of <5.
“You want cold white or warm white?”
“I need a cold light source, like an LED. I’m afraid the fixture would melt if I put incandescent in there.” (Yes, some E14 fixtures in cheap plastic bathroom mirrors etc. only take up to 10-20 W and have a warning sticker)
“What, higher temperature is colder?” (It’s not their fault though that in nature, white and blue things 🧊 are generally colder than yellow and orange things 🔥)
This scale feels wrong. 4000K is neutral white and should have no hue. Of course, that depends subjectively on what the light around is. 6000K should only be in the center if you’re outside a lot. And the difference between 6000K and 10000K is greatly exaggerated. Not even the visible portion of “infinite” Kelvin is that blue if 6000K is calibrated to white.
Someone got the short end of the stick
It’s easy to obtain, most farmers and horses will let you pose
Japanese toilets have heated seats, warm bidets, disinfectant, maybe active suction, automatic seat wiping, mood lighting, speakers, USB ports, Wi-Fi, demand-responsive toilet paper ordering services and whatnot.
What I’m talking about is a very simple mechanical system: being able to continuously control the water amount with the depth or duration of the “flush” button/lever press, which is a requirement to get an eco rating in my country, and such toilets have been common for decades. I think the similarly common 2-amount flush systems have a lesser eco rating and 1-amount flush systems are banned in most new installations.
To this day, you can’t change measurement units in Word Online. I have Czech language, timezone, locale etc. and it’s still inches. My grandma’s Word 1997 with Clippy can do that.
That sentence doesn’t convey grammatical aspect, resulting in people’s very different understanding (startup or continuous sound?)
Me too. I wonder if the hardening of “s” is something we got from the Germans, although we don’t have that other substitution they do (cukr-Zucker).
Correct, but the hardening of written “s” into a spoken “z” is about equally common. Then, some words have the “vz-” prefix, which some mix up with “s-” or “z-” too, and even “zvláštní” (means “strange” and has no prefix) gets misread as “vzláštní” extremely often.
SubArcticTundra is Czech though, and we use “s” for “with”. It’s a bit of a homonym but most people don’t struggle with s/z prepositions, the s-/z- prefixes are more problematic: you’ll see lots of people write “shlédnout” (look down) in place of “zhlédnout” (view, as in video or movie) even though “zhlédnutí” (views) is right there in YouTube’s UI.
Every toilet should allow a custom water amount, eliminating the need tor such half-assed “water-saving” solutions.
Proof that they don’t make them like they used to
Unfortunately, copyright is purposefully designed so that most works going into the public domain are irrelevant by then and nobody’s willing to convert them.