If you've been following my Christmas light saga, this year's video has made me happier than ever!
https://www.youtube.com/watch?v=qSFNufruSKw
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@TechConnectify woooooo!
one minor correction: LEDs don't produce monochromatic light. lasers do, because their coherent output results in a narrowband gaussian spectral power distribution (approaching the limits governed by spatial/temporal coherence as a result of uncertainty), whereas LEDs have a much more broadband SPD. it's certainly narrower than incandescent, much to your point, but it's not monochromatic (especially on optically pumped phosphor LEDs).
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@TechConnectify one of the reasons the blue LEDs look so absolutely eye-piercingly awful is that the quantum efficiency of that bandgap is suuuuuuuper high, so just a tiny bit of forward current gets you massive brightness. but the flipside of that is that pretty much all the white LEDs you love use exactly the same LEDs under the hood! they're just using that blue wavelength to optically pump phosphor to produce broadband white light. the tricky bit is not letting the blue leak through.
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@TechConnectify this is one of the reasons it's so tricky to produce high-brightness high-CRI low-CT (e.g. <3500K) LEDs. to get the low CT you need to cut the blue peak significantly, but since the blue light is what pumps the phosphor you can't mask it much without tanking the power efficiency (and increasing thermal load), plus you need to dope the materials just right to keep the SPD curve closely matching the point on the Planckian locus.
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@TechConnectify regarding the rectification, I'm kind of amazed that they got that bit wrong. I guess they're really cost-optimising the hell out of this stuff, but you can buy a mains 65W GaN USB charger for around $3.50/pc at qty10 on AliExpress these days (and it's actually pretty damn good - I've taken them apart and done the measurements) so it really does seem like they could do a proper AC-DC conversion here with some modernising of the electronics. easy to meet IEEE1789 no PSE risk spec.
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@TechConnectify (although come to think of it I wouldn't hold my breath on that front; my bet would be that these are being sourced as a white-labelled product from an OEM with customised glass, so they likely don't have the agency to change the power delivery electronics)
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@gsuberland @TechConnectify I did look at the website briefly and the totally over the top claims of in-house development and patents paired with the most bog-standard looks of the hardware immediately triggered my BS detector on Chinese bulk white labelling.
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@RichiH @gsuberland I had a conversation with the folks at Tru-Tone and... this is pretty much the only way to get Christmas lights made.
The reason the market sucks is that big box stores aren't speccing anything at all, they're just telling overseas manufacturers "sell us what you got" so the creative license is handed over to the OEMs who largely don't understand why anyone would want desaturated colors.
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@TechConnectify @gsuberland what specifically do you mean with "only way"? Manufacturing in Asia to maintain the 1000%+ margin, certainly.
It's not just speccing; for non-trivial stuff it's usually better to go on site and talk to the engineers leading production as the re-re-re-resellers lose too much information in their chain.
Agreed that taking some, just any, control over the resulting product will massively improve it - unless it's something that A Thing(TM) over there already.
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@TechConnectify @gsuberland I realized this could be read very negatively. I don't fault anyone doing things this way.
The strong claims around the lights being an original invention is what I find distasteful. In particular if anyone tries to patent the concept of colored plastic
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