Um… That part is concave so adding material (area) decreases circumference.

The most common ones were books that you’d flip east/west through, or skip to the indicated page for north/south, right?

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.

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).

404: Image not found

Not a genius. This thing is called a monogram, the most basic logo design. Used mostly by couples, law firms and couples’ law firms.

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.

KDE’s Kiki feels offended

You’re right, at that size the AI is not very concerning either.

Do your and your partner’s names both start with L?

Thanks, those give me ideas for making more operator logos like these (No AI but mostly CC0 (public domain) because my creative input is questionable, some are just tracing of scaled-down images with a few touch-ups; I’m not too concerned about sharing non-FOSS trademarks under a permissive licence at such low res)

In that way, yes, but the logos that feature small text (Groovy, Lua) didn’t turn out well at all.

Here’s the list of logos row by row so you don’t have to awkwardly ask what they are

Steam (not FOSS)*
“LL” (likely OP’s own design, not a FOSS project)*
Zigbee
Obsidian (not FOSS)*
Brave
Protonpass

Tailscale*
Home Assistant
Raspberry Pi (not open HW)*
Ubiquiti (not open HW)*
Android (not really FOSS)*
Signal

DigitalOcean (service)*
Ubuntu
Linux
Claude (not FOSS)*
Proxmox
Nextcloud
Jellyfin (rotated)

Trilium
Nginx
Tabby
Bash
Debian (rotated)
Docker

NodeJS
Python
HomeBox
XPipe
PiHole
Prometheus
Grafana

* not in gallery of printable sticker images

What is the “LL” monogram in the second one? I crudely recreated it to reverse-image-search but got no results.

Someone got the short end of the stick