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Joined 2 years ago
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Cake day: June 17th, 2023

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  • Good question and I’d like to know. From the linked paper in the linked article,

    (445 nm; 1.25 W/cm2)

    Sunlight is 1000W/m2, which I believe to be the sum of all wavelengths. 1m2 is 10,000cm2, so their light would have a total energy of 12,500W/m2 if I did my metric right. I’ve wandered into a field I don’t have all the info were.

    rerouting

    Let me try running around in Watts. I picked out a royal blue, 450-465nm Cree XE-G LED from LEDSupply. At max 3,000mA, forward voltage is 3.7v. That’s 11.1W of energy consumed. I’m not sure how to find an exact efficiency ratio, but Wikipedia puts it around 30% light, 70% heat in the page on “thermal management of high power LEDs). For reference, incandescent is about 10/90%. From there, I’ll round down for optics and call it 3w total light. That gives you the light output density for 2.4cm2, or an 18mm circle, or like a 3/4” circle, or a little less than a US penny. All with a fist-sized heatsink and a fan. Per LED.

    I think.




  • But like, you can’t just delete someone’s wealth, because they can’t just rebuild an empire from scratch. These self-made billionaires are so strapped for cash, charitably speaking, because they need the capital to fund future charitable investments. Don’t you want to get a trickle of charity more than once? That’s why they can only donate like 10mil a year. Also partly because humans are really bad at estimating the difference between 10mil and 400bil. It’s like a factor of 40. They’ll be drained of wealth after 40 years at 10mil a year.

    Oh wait. Hold on. 40 years… 10 mil/year… So 400 million… If we froze their wealth of ~390bil, by the end of this scheme, they’d have… ~390,000,000,000- 400,000,000 =~389.6bil.

    OK nevermind fuckem




  • Micro was weak and largely people’s first experience with frequent-use plugging. Cheap cables don’t last long. Car use is abusive, even using the phone while charging is harsh. Moving the phone by the wire. Hard cable angles to keep the phone upright in stands, cup holders, cups, whatever. Rolling the cable tight for storage or travel. Pulling by the cable to unplug instead of by the head. Accidentally tripping on cables or otherwise yanking them. It’s death by 1,000 papercuts for the cable. Shit happens.


  • I’ve had many micro cables get broken, requiring the perfect angle, but never the ports themselves as far as I could tell. I’ve never had a C port fail either and rarely have cable issues. However, any time the C ports require a specific angle to work, I have found they’re packed with lint. It goes with the “click” getting weak as well. Paperclip, Sim card pick, compressed air, a good cheek puff, usually all good after.


  • XeroxCool@lemmy.worldtoflashlight@lemmy.worldLED headlights are cool though
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    20 days ago

    Headlight height has nothing to do with this conversation. Frosting the headlights on an F-150 will reduce their throw. The F-150’s headlights will be made brighter to compensate. Your Sentra will now be blinded all the same. The solution to this problem is lowering headlights in the type of the Juke and Gen 1 Cherokee (not grand Cherokee, the 2015 compact).

    Your sentra’s hazy headlight is throwing more light at oncoming drivers than the clear, properly aimed headlight.


  • XeroxCool@lemmy.worldtoflashlight@lemmy.worldLED headlights are cool though
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    20 days ago

    I have no idea what point you’re trying to make anymore. If your headlights have a clean cutoff, meaning light is not spilling upwards above the low beam’s hot spot, and they’re aimed properly, you’re not blinding anyone unless you’re both peaking a hill. Any lights blinding you are either aimed wrong or something is wrecking the proper optics - hazy lens, wrong bulb type, damage, etc.

    Why are you a proponent of spilling light sideways outside of your usable area? Even fog lights, with their very wide beam, are useless at highway speeds. Anything they illuminate outside the standard low beam is outside of what you can run into typically and is much too close to react to.

    I have no idea why you’re bringing the Haynes/Chilton manuals into this. Every car gets an owners manual.

    I assume you’re just trolling now. Good night.



  • XeroxCool@lemmy.worldtoflashlight@lemmy.worldLED headlights are cool though
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    21 days ago

    Then again, I begin to assume you’ve never adjusted headlights before… I have.

    I’ve been in the projector retrofit world for 15 years, going back before threaded shaft mounts, back on hidplanet, back before photobucket decimated forums. At no point is a diffuser the answer to a better headlight. 2000lm aimed wrong is blinding whether it’s from a penlight or a paper-sized diffuser. Try going full dark adapted and looking at a full moon. It hurts. And that’s a light source only worth 1cd on the ground around you.

    If you can’t recognize how much poorer your hazy headlight is for distance, you aren’t solving the headlight problem. You claim to know how to aim a headlight properly, yet the hazy headlight isn’t even giving you a proper beam pattern on the wall to aim. And actually, why is the clear headlight blinding people when you claim to know how to aim th properly?


  • XeroxCool@lemmy.worldtoflashlight@lemmy.worldLED headlights are cool though
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    22 days ago

    Oh, your proposal is to diffuse the light? No, that’s how you end up blinding everyone ahead of you instead of just those that happen to be below your “cutoff”. The point of a low beam is to give as much light as possible to the road ahead of you without shining into anyone’s eyes. High beams have a less-defined blob of light extending upwards. Diffusing a low beam makes everything worse. If you want an example, just look at any older car with hazy headlights. They’re blinding other drivers and reducing their distance/throw.


  • The largest offender group is people using bad lights in various forms. The “Fuck you, got mine” crowd that 1. Used to install HID bulbs in non-HID housings, 2. Currently installs shitty inaccurate LED bulbs in any housing (there is no factory-replaceable LED bulb), or 3. Uses aux light assemblies that have never offered dipped beam/low beam options (a driving light is a high beam; most are just apot/floods anyway).

    While options 1 and 2 may appear like a glaring hazy headlight, the beam is actually fucked from the start.

    As for proper OEM lights that are blinding when you’re below the cutoff due to hills, that’s always been a problem. Factories aim these too high though and the average driver is clueless what proper aim looks like and that they have the power to adjust it. Then add in the increase of SUVs with high-mounted low beams…

    This is what grinds my gears. We’re fucked.