General > General Technical Chat
The EU is banning 8K TV's!!!
vk6zgo:
--- Quote from: SiliconWizard on November 03, 2022, 06:24:49 pm ---
Don't bother replying to this kind of argument. It always the same, uninformed that we have addressed a few times but it still doesn't sink in.
There was a recent thread about hearing as well in a simiilar vein.
To begin with, any such statement should come with a definite and clear statement about "what the eye can use". Let's start the fun. It's much more complex than it appears. It would basically require books of thousands of pages and years of study. For the amount of stuff that is currently known. Which is not even the end of the story.
Anyone non visually impaired has no trouble seeing the difference between FHD and 4K even on a relatively small screen. No doubt the difference between 4K and 8K on a larger screen will be very apparent.
I am absolutely all, 100% for using proper science and debunking bullshit, but when poor science is used as a pretext to pass as smart when you know jack shit, well, nope. :popcorn:
--- End quote ---
Thanks for the sneer, but some of us were exposed, even if secondhand, to the conclusions of the original research current at the time we learnt about associated things.
The decisions on TV standards by the relevant authorities were all informed by those studies, which gave us mortals some "rules of thumb" for what sort of resolution is adequate.
Indeed, later research may well have proven those conclusions, & my comments, to be wrong, but isn't the onus on you to give some examples of how "much more complex" it is.
"Because you say so" just doesn't hack it!
Jackshit my backside!
vk6zgo:
--- Quote from: tom66 on November 04, 2022, 09:18:25 am ---
--- Quote from: james_s on November 04, 2022, 01:47:35 am ---It was only an example to illustrate a point I think. Also since when has something being pointless stopped a politician from trying to legislate it?
--- End quote ---
Politicians can promote anything they like, that's politics. But the EU is a technocratic organisation. Things are debated amongst industry professionals for years before even a draft piece of legislation would be written. No doubt the 500W kettle limit will never happen. If anything, the EU might mandate a 3kW kettle as standard, because it will likely be more efficient than a 2kW model.
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There are other concerns than power rating & efficiency:-
Using the standard 230v RMS EU voltage standard, for a 500w kettle ,I=2.17A (approx), a 2kW kettle, I= 8.7A(approx), whereas for a 3kW kettle, I=13A(approx)---spot on the UK 13A plug fuse rating!
For the NA 120v voltage standard the figures are : 500w unit I=4.17A (approx), 2kW, I=16.7A (approx), & for 3kW, I=25A(exactly)!
JohanH:
In many EU countries 10A fuse and wiring might be used (even though socket itself is rated 16A), so I guess larger than 2.3 kW isn't going to be standardized (if it were).
coppice:
--- Quote from: nctnico on November 04, 2022, 12:18:55 am ---My experience with CFL bulbs is that the more expensive, long life ones have a long lifespan but they tend to startup slow. The cheaper ones crap out quickly. I have replaced the CFL tube armatures I have with HF drivers. HF drivers make the tubes last almost forever. Though I have not found LED panels that have >90% CRI like the CFL tubes I have in my lab and workspace so I'll stick to CFL in there.
--- End quote ---
The range of both CFL and LED performance is huge. However, I have still to see a LED bulb that can match a 1990s National/Panasonic CFL. Those things went on for years and years, with good efficiency, and pleasant illumination. Their only downside was their slow start, and the classic negative for any fluorescent lamp - don't use them in places where they have many short runs, like domestic bathrooms.
unknownparticle:
LED lighting is still far from perfect, even ideal. The main enemy of any LED lamp is heat. Enclose them and they die prematurely, sometimes very. Even semi enclosed is a problem, depending on the air flow, if airflow is restricted, like for example, an angle poise lamp, life is reduced. To achieve max life the lamp has to be in free air.
Most are not compatible with outdoor use, with some products even stating that on the packaging, I have proved this to be true, they die quite quickly.
Quality is variable and difficult to judge from appearance. If you buy Philips or a similar quality brand, then OK. Buying cheapies is a lottery.
I've found Ikea, Aldi, Liddle etc, which are low price, to be surprisingly good. I've stripped a few failed ones down and these brands have good build quality. The unknown one hung low brands vary from cr4p to as good as Ikea, Aldi & Liddle but you cannot know until tried.
And non, even Philips, get anywhere near the 10's of thousands of hours life claimed.
However, compared to incandescent and CFL, it's LED every time.
I visited a friend this summer, who I hadn't seen for many years. We were chatting in the evening and I'd noticed the multiple ceiling halogen down lighters in the kitchen and lounge, the conversation turned to energy costs and she was moaning about her bill. I asked her if the down lighters were still halogen, she replied she didn't know but they'd been in for over 20 years, so yes, they were. I did a quick calc on the probable consumption and it was around 1 to 1.3 KW with them all on!!! When I explained what that meant she said that they would be out the next week to be replaced with LED!!! She hadn't even changed the table lamps and other lamps to LED, she thought it wasn't worth it!
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