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Philips to unveil new LED technology — Parallax Forums

Philips to unveil new LED technology

Ron CzapalaRon Czapala Posts: 2,418
edited 2013-04-12 11:28 in General Discussion
http://news.yahoo.com/goodbye-fluorescent-bulb-philips-says-112843502.html

EXCERPT

The technical milestone the company claims to have achieved is the ability to produce 200 lumens of light per watt. A lumen is the standard measure of the amount of light a lamp casts in a given area.

According to Mark Hand, a technology expert at Philips competitor Acuity Brands Inc., that's about twice the output per watt of the best fluorescent tubes currently on the market; he estimated the best LED lamps may get up to 120 lumens per watt.

Comments

  • prof_brainoprof_braino Posts: 4,313
    edited 2013-04-11 14:26
    LED lights rock! The crappy high powered modules from china can have a wide deviation in quality, but they (can) produce slightly more lumens per watt than florescent. They just get a little hotter (which is still cool enough to touch most of the time). They can only handle so much power, so I end up using several to replace a single floruescent. For example I use 1 module at 10 watt to replace a 30watt halogen puck light, and its brighter. This works for under cabinet lights, but I need two or three to replace the light over a sink.

    200 lumens per watt and decent quality control would certainly be a game changer.
  • jmgjmg Posts: 15,173
    edited 2013-04-11 15:26
    Some of the usual Marketing / Stock talk-ups here.

    They compare a LAB R&D LED, that will not ship until 2015, with production LEDs shipping now..
    They even have to admit Cree are way ahead, and shipping 200 l/w today, but try to claim Philips will have better Colour temp.

    I am sure Cree will be better, in 2015 too !!
  • TorTor Posts: 2,010
    edited 2013-04-12 01:27
    Well, all heating around here is electric anyway.. and no aircondition. So a LED light won't save even a milliwatt for me. And with my experience with the new light technology I will claim that the heavy part of the research and engineering the last few years has been about how to get the light tech to fail quickly. LED lights last three months, at best, in my experience. How is that even possible? LED? They should last decades.They must have worked really hard at that (not to mention the bogus claims on the package.. '10000 hours' and what not.. that claim includes the time when you're not using the light at all! One LED package had written in tiny letters "..at 2.1 hours per day", and, right enough, it lived for less than 900 hours).

    -Tor
  • GadgetmanGadgetman Posts: 2,436
    edited 2013-04-12 01:47
    If you use a heat-eaxchanger such as an air-to-air heat-pump, you have get 3x the energy efficiency as if you use a 'conventional' heating system.

    A lot of the 'cheap' LED lights burn ut fast because they're running the LEDs at much higher power than they're designed for.
  • CuriousOneCuriousOne Posts: 931
    edited 2013-04-12 02:42
    What about CRI?

    Even latest leds with acceptable CRI deliver only 45-65lm/w today...
  • kwinnkwinn Posts: 8,697
    edited 2013-04-12 09:11
    It pays to read the fine print on the packages. When CFL's first came along I was curious to see if they came close to living up to the lifetime claims so I wrote the date on the ceramic base when I installed them. Only a few came close to their lifetime claim but they were much better than incandescent bulbs. We had a chandelier with 7 bulbs above the dining room table and I was changing bulbs almost weekly until the switch to CFL's.
  • prof_brainoprof_braino Posts: 4,313
    edited 2013-04-12 11:22
    Tor wrote: »
    .... LED lights last three months, at best, in my experience. How is that even possible? LED? They should last decades....

    They run them with way too much voltage, and that gives a TINY bit more brightness, and reduces life to 1/10 or worse. Sounds stupid, but I guess it sell more diodes. So instead of getting the first run bulb replacements (which are major Smile still), just get the raw LED and DIY.

    IF you get a 12 volt super bright LED, and run it at 10 volts, (the ones I have) last and last. Instead of using 1 @ 12 V, I do 2 or 3 at 10V. Its way brighter and should last longer than I'll live.

    There are some new Phillips 40 watt replacement bulbs that have pretty good color; but I'm waiting until the 800 lumen 60 watt replacements are under $9 before I go swapping out all the lights in the house. By that time, I may have everything already 12 volt indirect lighting.
  • prof_brainoprof_braino Posts: 4,313
    edited 2013-04-12 11:28
    kwinn wrote: »
    ....wrote the date on the ceramic base when I installed them.....

    I do the same. CFL's started bad, but got better; LED's start terrible and are getting better. Even so, being 10x better than incandescent. its better to replace with the LED's when an incandescent or CFL burns out, IF you can spot the LED that is the best bang for the buck. Which is the most lumens per watt, from the best name, for under $9

    It also helps to return the defective ones to replace them for free while quality is getting sorted out.
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