By must, is that only for energy efficiency?

I ask only because I was retrofitting some navigation lights on a sailboat - and you can’t just upgrade the original incandescent bulbs with LEDs (or aren’t supposed to).

You are either supposed to get a special LED (backing up what you’re saying) or there are some new red/green enclosures that are differently treated / tinted to then put a “white” led into.

But I am so far from an expert on that, I may be completely misunderstanding.

When you use any kind of filter for a lamp, that stops a part of the light produced by the lamp, the part that has an undesired color.

So, at the same electric power consumption you have less light, or you can compensate by using a more powerful lamp, to get the same amount of light even with a filter. In both cases the energy efficiency becomes worse, i.e. the expenses for electric power are greater per output light.

On the other hand, when the manufacturer of the lamp controls inside the lamp the conversion of the light produced by the LED through fluorescence into the light that exits the lamp, there are chances to obtain a desired color and a certain shape of the emission spectrum by wasting less light than with external filters.

Filtering can correct a lamp color that is not the color that you want, but it cannot fill gaps in the emission spectrum of the lamp.

Cheap white LED lamps not only may have a too bluish color (or in some cases a too yellowish color), but their emission spectra may have gaps, so if a natural object from the environment happens to have a color that falls in a gap of the LED lamp spectrum, it will appear much darker than in daylight. This can cause orientation problems or difficulties in identifying certain things.

Where LEDs are used for signalling, not for lighting, so pure colors are desirable, much less problems exist, so e.g. the replacement in the red or yellow signal lights of cars, of the old incandescent lamps with color filters, with monochromatic LEDs without color filters, has posed no difficulties.

I used a Nokia in the early 2000s. But my fondest memories are of my W810i (much “newer” than the GH388… by about 11 years ).

I notice most of the phones seem to be missing SIM cards = intentional disposal ? Or have they just come apart over time?

Yeah likely just thrown away.

My early phones were all Ericsson later Alcatel which had a nice AA battery powered one! That was in 2000-01. First camera phone I think was a Siemens.

What a decline for European brands!

I largely thought this wouldn’t work, but having tried it at several grocery store chains while traveling with a 100% success rate so far I’m not complaining. (Nothing worse then being told you can’t sign up because customer service is closed, and you have to sign up to get the pricing, and there’s no generic store card they can scan as a curtesy ).

- this has worked for me in Rhode Island, Connecticut, Virginia, West Virginia, Michigan, and Wisconsin.

As an adult, I bought on impulse a set of wooden dominos intended for domino runs. It included a few other props. It was on clearance for almost nothing because the box was damaged.

With friends and family on occasion (individuals ranging in age from 27-70) , multiple hours have passed setting up and playing with this domino set.

I really believe that play is vitally important at all ages.

I have a love of wooden blocks.

I’ve seen some sets that are blocks with random flat surfaces but still balanced.

However, I notice that many antique block sets seem far superior to newer sets.

(I’m sure someone must make an amazing new set, I see some suggestions in the comments).

Having made some wooden block sets from scratch, what I am always amazed about with a good set is balance / size of pieces, coupled with variety and quantity. The balance being a vitally important part that seems to be overlooked in “bad” sets.

I also played wooden blocks for hours as a kid but I've tried getting them for my kids and they're not interested. And I suspect it's because the product is worse than the set we had from the 80s.

This is such a charming project! I’ve been quite taken for years by the “Christmas” decorations that spin using a candle.

I quite like these more - mainly because they could be added onto a lamp that puts off heat, and be kind of a perpetual decoration with subtle motion.

I love your “dad turbine” design, and the flying wing has some magical quality to it.

Thank you so much for sharing!

I’ve heard of “Idiot wisdom” and “wise wisdom”.

Idiot wisdom - is generic platitudes that sound nice, but aren’t actionable.

Wise wisdom- might not always sound nice, but is actionable.

My ego likes this article, if I believe that I pursue thick desires.

But some part of me thinks (and perhaps due to the written style ). That this is idiot wisdom.

Another commenter mentioned it ties to Tanha in Buddhism.

I don’t know. But- off to read some Shunryu Suzuki….

Most definitely idiot wisdom. All the comments here lauding it, are pointing out first how they feel good about the text. That it resonates, that they like it. The importance of the content was that they felt good reading, not that they learned something.

What would be an example of "Wise wisdom"?

I was very taken by the orange bar on the left that very discretely shows you how far you’ve scrolled in the article.

Almost like a, gasp, scroll bar? Who could have imagined those things might have some sort of purpose??

What would be the correct word? Specimen?

An ichnofossil is the fossil of activity of a living thing.

But specimen seems like it might work as long as you’re not using wet / embalmed with it.

Vitrification maybe almost works, but doesn’t seem to really work for a snowflake.

Aquastasis ? (Joking)

Apologies. After reading this I’m now wracking my brain trying to figure out what would be the correct word to apply to creating a /mold/ model / sample of a snowflake.

I believe it would just be called a casting or impression, even if it were an ancient object that had been preserved across geological ages.

Thank you! That makes a ton of sense. I somehow couldn’t make that connection mentally.

Now we just need some special rule to make them into fossils… maybe if they’re over 20,000 years old- double the specimen quasi rule.

Petrified? Like petrified dunes? Simply preserved?

Imprint, maybe?