No Stupid Questions
No such thing. Ask away!
!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.
The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:
Rules (interactive)
Rule 1- All posts must be legitimate questions. All post titles must include a question.
All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.
Rule 2- Your question subject cannot be illegal or NSFW material.
Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.
Rule 3- Do not seek mental, medical and professional help here.
Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.
Rule 4- No self promotion or upvote-farming of any kind.
That's it.
Rule 5- No baiting or sealioning or promoting an agenda.
Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.
Rule 6- Regarding META posts and joke questions.
Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.
On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.
If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.
Rule 7- You can't intentionally annoy, mock, or harass other members.
If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.
Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.
Rule 8- All comments should try to stay relevant to their parent content.
Rule 9- Reposts from other platforms are not allowed.
Let everyone have their own content.
Rule 10- Majority of bots aren't allowed to participate here. This includes using AI responses and summaries.
Credits
Our breathtaking icon was bestowed upon us by @Cevilia!
The greatest banner of all time: by @TheOneWithTheHair!
view the rest of the comments
This can vary a lot depending on the LED. The average LED is indeed somewhere around the 50% and 60% mark. But there are LEDs out there that can get up to 90+%
The highest I'm seeing for wall-plug efficiency (i.e. the percentage of the consumed electricity that's released as light rather than heat) is 83.2%, and that's for red LEDs. For anything you'd want to use for general-purpose lighting, the number is much lower.
Yeah wall plug efficiency is much harder since you need to do the power conversion as well, in a small and cheap way for mass production. I'd assume they have a specialized power supply for the big LED in the sky?
There are super efficient LEDs used in flashlights, the lumen per watt figures these days are absolutely crazy.
Flashlights are actually where wall-plug efficiency matters most, because nicer flashlights are limited almost entirely by heat. Even if we got to 98% efficiency, going from there to 99% would nearly double the brightness that you could fit in a given size.
Power input isn't a problem at all, by contrast. A tabless 21700 can do 70A continuously without breaking a sweat, which is over 250W, and that's with a 5Ah cell, which is plenty of capacity. A 6Ah cell can do about 10A, and that's plenty for basically any single-cell light out there.