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Thread: Finally! A decent LED bulb for $10 (review)

  1. #31

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by Dave_H View Post
    I tried dimming this bulb with a cheap in-line socket dimmer, and it dims smoothly down to zero. On the way down, I could see the 18 SMT LEDs inside (as noted earlier in the thread).

    Dave
    I believe that this bulb uses a pair of bridglelux arrays, which would resemble a pair of 3x3 SMD formations.

    EDIT - my mistake, I'm thinking of the Home Depot house brand "40W" bulb I have on my desk lamp
    Last edited by idleprocess; 02-21-2012 at 09:58 PM.
    I apologize that this letter is so long; I did not have time to write a short letter

  2. #32

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by Dave_H View Post
    I tried dimming this bulb with a cheap in-line socket dimmer, and it dims smoothly down to zero. On the way down, I could see the 18 SMT LEDs inside (as noted earlier in the thread).

    Dave
    could you please provide a picture inside ?

  3. #33

    Default Re: Finally! A decent LED bulb for $10 (review)

    what's the product?
    The brighter the light, the darker the shadow.

  4. #34

    Default Re: Finally! A decent LED bulb for $10 (review)

    Same LED that is in the new 60W equivalent or it least that's what it looks like to me: http://i1083.photobucket.com/albums/...F/P1010250.jpg

  5. #35

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by Harold_B View Post
    Same LED that is in the new 60W equivalent or it least that's what it looks like to me: http://i1083.photobucket.com/albums/...F/P1010250.jpg
    Thanks the picture.
    The PKG(5630 LED)looks like SSC PKG, the new PKG, and 9Series and 2Parallel . But I guess the 1/2 beam angle is not wide enough.

  6. #36
    *Flashaholic* PhotonWrangler's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    Thanks for the picture! It's neat to see what's under the hood in these lamps.

  7. #37

    Default Re: Finally! A decent LED bulb for $10 (review)

    We've been collecting Goniospectroradiometer data, Integrating Sphere data, and thermal images of several LED bulbs. The plan is compile the data and correlate that with CAD models and simulations to generate IES ray sets and IGES files along with reports about how each bulb is made and performs. We'll make them available for download at somepoint in the near future although I can't say when. Not because it's a secret but because making the website isn't my thing.

  8. #38
    *Flashaholic* PhotonWrangler's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    Thanks Harold. I had to look up Goniospectroradiometer. Do you work for NIST?

  9. #39

    Default Re: Finally! A decent LED bulb for $10 (review)

    " Do you work for NIST?" Man I wish!! Those people have all the great toys. On the other hand they also have to justify their positions continually for funding. I am a partner in a Photonics Engineering Consulting company and we have a joint venture to manufacture our own HBLED so we need a lot of toys too.

  10. #40

    Default Re: Finally! A decent LED bulb for $10 (review)

    Hey this is really a great thread to post about with regards to the Led energy efficient bulbs, they are a great source of energy conservation with the adequate & powerful brighter lights compared to the normal cfl bulbs..

  11. #41

    Default Re: Finally! A decent LED bulb for $10 (review)

    These bulbs are pretty cool! My local store has them on sale for around $11 now. I found a review here comparing it to a plain old CFL.

  12. #42

    Default Re: Finally! A decent LED bulb for $10 (review)

    Maybe this thread is a bit short in regards as time to be a fair sample segment, but according to Haitz's law, and given the development cycles of manufacturers like Cree and Bridgelux, I'd figure we'd have seen something a little better show up on the market by now at a similar price...

  13. #43
    Flashaholic* JohnR66's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    I was quietly predicting that 2012 would be the breakthrough year for LED bulbs for the general public with price/performance becoming such that people will start buying them in much larger quantities. Perhaps I have predicted too early as price of some of this newer technology is still sky high and I have not seen very many good LED bulbs at the $10 price point. It has been almost a year since I bought these bulbs.

    The warm white version of this bulb seems to be on perpetual sale for $11-$12 over the last few months. I'm not comfortable with its reliability after hearing feedback from others. The first one I bought died in a day. A reviewer on youtube had 2 of three of his quit. A few other folks lost a couple as well. A 20-40% failure rate is not that great to me and scares off public acceptance of LED bulbs. For me, the premature failure rate of CFL bulbs is less than 5%.

  14. #44

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by JohnR66 View Post
    I was quietly predicting that 2012 would be the breakthrough year for LED bulbs for the general public with price/performance becoming such that people will start buying them in much larger quantities. Perhaps I have predicted too early as price of some of this newer technology is still sky high and I have not seen very many good LED bulbs at the $10 price point. It has been almost a year since I bought these bulbs.

    The warm white version of this bulb seems to be on perpetual sale for $11-$12 over the last few months. I'm not comfortable with its reliability after hearing feedback from others. The first one I bought died in a day. A reviewer on youtube had 2 of three of his quit. A few other folks lost a couple as well. A 20-40% failure rate is not that great to me and scares off public acceptance of LED bulbs. For me, the premature failure rate of CFL bulbs is less than 5%.
    Perhaps once the higher-temperature offerings from Cree, and Lumileds (and doubtless other LED OEM's) are out, it will help drive up reliability and drive down cost.

    Still waiting to see if Switch's offerings cut it (or simple materialize at this point) - their cooling approach is novel plus it has a certain aesthetic appeal.
    I apologize that this letter is so long; I did not have time to write a short letter

  15. #45
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    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by JohnR66 View Post
    The warm white version of this bulb seems to be on perpetual sale for $11-$12 over the last few months. I'm not comfortable with its reliability after hearing feedback from others. The first one I bought died in a day. A reviewer on youtube had 2 of three of his quit. A few other folks lost a couple as well. A 20-40% failure rate is not that great to me and scares off public acceptance of LED bulbs. For me, the premature failure rate of CFL bulbs is less than 5%.
    Lowes in Canada price is holding at $13 but it's not presented as a
    sale price. Closest comparable product is LEDMax (Globe Electric)
    8W LED bulb at $20, which is still 50% higher price.

    Any better idea what the failure cause is? Could it be susceptability to bad line conditions, and some people are luckier than others? I
    have really good luck, very low early failure rate for CFLs, and LEDs so far
    excepting that one LOA showehead bulb (running but dimly...)

    Dave

  16. #46

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by Dave_H View Post
    I
    have really good luck, very low early failure rate for CFLs, and LEDs so far
    excepting that one LOA showehead bulb (running but dimly...)

    Dave
    If "LOA" is "Lights of America" then you've had good luck indeed given their horrible reputation.
    I apologize that this letter is so long; I did not have time to write a short letter

  17. #47
    Flashaholic* LEDninja's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    Dave was running his LOA outdoors in the Canadian winter. The LEDs never got hot until summer. Still 2 winters and a summer is pretty good for 5 mm LEDs.

  18. #48
    Flashaholic* bshanahan14rulz's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    LOA pisses me off. Just the other day I was talking to a very intelligent M.E., his son was in school for E.E., and he was talking about how disappointed he was in LED bulbs, after I had shown him my old rinky-dink L2 with XR-E Q3 5A tint. He was saying how many of the bulbs seemed to fail too quickly, didn't put out enough light, etc., and I knew right away what brand he was using. Grabbed the closest 5mm strawhat LED I could find, and sure enough he told me the bulbs he was using had many of those stacked in them.

    I'll enlighten him sooner or later.

  19. #49
    *Flashaholic* fyrstormer's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    I've been using the Philips AmbientLED 12W in my apartment as my ONLY light source for over a year now. I kept one bulb unused in my linen closet. When I compare it to bulbs that have been used daily, they look the same.

  20. #50

    Default Re: Finally! A decent LED bulb for $10 (review)

    There is now a 5000K version of this bulb available at Lowe's for around $20 (Per lowes.com: "Item #: 352274 | Model #: LA19DM/5K/LED" ... since direct links appear to be frowned upon, you'll just have to find it yourself). I bought one for my porch light thinking it would compliment the "neutral" LED's I installed outdoors.

    It's nice to see options other than the 2700/3000K options that dominate LED "bulbs" and it's not as bad as the "angry blue" of white LED's some ~5 years ago ... but it's still a bit too cold. NY existing lighting is more like 4000K, so there's a moderate mismatch. Nothing that another outdoor lighting project I've been kicking around won't change - and remove that pesky socketed fixture altogether in the process.

    I'd like to think I was at least voting with my dollars for options other than 2700/3000K which is all that's available from most manufacturers.
    Last edited by idleprocess; 04-24-2012 at 08:44 PM. Reason: somewhat better photo, item number
    I apologize that this letter is so long; I did not have time to write a short letter

  21. #51
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    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by LEDninja View Post
    Dave was running his LOA outdoors in the Canadian winter. The LEDs never got hot until summer. Still 2 winters and a summer is pretty good for 5 mm LEDs.
    I was, but it dimmed in a few hundred hours. I replaced it with a Sylvania
    2W/50L E27 bulb, which still works fine but moved inside; replaced with
    a 4W/200L LEDMax (Globe Electric) bulb also still working fine. I may put
    the Feit 8W bulb out on the porch, but the 4W one gives enough light.

    Dave

  22. #52

    Default Re: Finally! A decent LED bulb for $10 (review)

    Old thread but...I've had one of these running in an enclosed porch light, base up, in North Carolina (hot summers) for 6 months straight...still working fine. Maybe not turning it off and on helps.

  23. #53
    Flashaholic* kaichu dento's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    I picked up some 5.8 watt 'bulb tint' Orion Luminous 350 lumen, 40,000 hour rated bulbs for $5 each last month in Japan and have to say that while a little short of perfect on tint, are a great value for the money.
    They are also dimmable by turning off the light, then back on and are supposed to give 20%, 50% and 100% brightness.

    Tried all four in my friends chandelier and two of them in a horizontal ceiling fixture. With all four combined they did well enough for living room lighting, assuming you weren't trying to read the paper, but quite nice for normal room lighting to eat dinner by.
    One place they're not good is in a horizontal fixture, as too much light ends up on the wall at ceiling height, and not enough on the floor below, although it seemed to bother me more than my friend.

    I couldn't find the same bulb I have but here's some information on the 400 lumen version of it, and the package looks exactly the same other than the output rating.
    Marduke - Solitaire...I've seen matches which are brighter AND have a longer runtime. 光陰矢の如し

  24. #54

    Default Re: Finally! A decent LED bulb for $10 (review)

    I wouldn't expect too much on this product given on its low price.

    But I would say this is a bargain with such quality.

  25. #55

    Default Re: Finally! A decent LED bulb for $10 (review)

    I had the 60w equivalent 13.5w Warm White 2700K (seems they abandoned 3000K at least on the packaging) in my hand today and almost pulled the trigger. After reading a couple of threads on it, Ill probabaly give it a go next week when Im in town.

  26. #56

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by Harold_B View Post
    We've been collecting Goniospectroradiometer data, Integrating Sphere data, and thermal images of several LED bulbs. The plan is compile the data and correlate that with CAD models and simulations to generate IES ray sets and IGES files along with reports about how each bulb is made and performs. We'll make them available for download at somepoint in the near future although I can't say when. Not because it's a secret but because making the website isn't my thing.
    I would hope that reputable suppliers would be able to provide that data. That has been my experience even from secondary Asian suppliers, at least photometrics. If they want EnergyStar they must have LM79 data.

    Semiman

  27. #57

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by Harold_B View Post
    Same LED that is in the new 60W equivalent or it least that's what it looks like to me: http://i1083.photobucket.com/albums/...F/P1010250.jpg
    Nice layout -- not. Look at the traces from LED to LED. That appears to be the only copper on the top. It looks like they have made no use of top layer copper to improve thermal performance. Not the first Chinese made lamp I have seen with this issue. It may only make 5C difference in temp, but that could be the difference between meeting long term specs and not. Of course if the primary thermal path is through the leads on this LED, then it would make a big difference.

    Semiman

  28. #58
    Flashaholic* JohnR66's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    Just a "Heads Up"...
    I was at Lowes today and found these Utilitech 7.5w 3000K LED bulbs on sale for $7.98 which is $2 off the 9.98 standard price.
    I also noticed that the lumen output has increased slightly from 430 to 450 and warranty is increased from 2 to 3 years.

  29. #59

    Default Re: Finally! A decent LED bulb for $10 (review)

    Quote Originally Posted by SemiMan View Post
    I would hope that reputable suppliers would be able to provide that data. That has been my experience even from secondary Asian suppliers, at least photometrics. If they want EnergyStar they must have LM79 data.

    Semiman
    Wow, have I been out of touch with this thread! Bulb suppliers/manufacturers really don't supply much data as far as photometrics or ray sets or IES files needed to model their products. Fixture manufacturers do but not the bulb. Plans to post the results changed (mostly a marketing thing) so the efforts have been put on other projects.

  30. #60
    *Flashaholic* PhotonWrangler's Avatar
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    Default Re: Finally! A decent LED bulb for $10 (review)

    I just picked up one of the new 3M 60w equivalent bulbs in warm white.

    Good: Nice bright white light at 3000k.

    Fair: light has a faint "starry" pattern due to the integral diffusion fabric.

    So-so: bulb is a little large and heavy, and at $25 it's significantly more costly than the competition.

    Derp: The package says 850 lumens in large lettering. The bulb itself says 800 lumens in tiny lettering.
    Last edited by PhotonWrangler; 04-23-2013 at 04:11 PM.

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