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Old 01-05-2019, 03:49 PM   #41
stj
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Default Re: Feit electric LED lamp autopsy.

IMO the best bulb was from philips, but they discontinued it for cost reasons.
it used blue/uv led's with a special phosphor loaded plastic casing.

the casing was relativly cool so the phosphor didnt degrade like it does on "white" led dies.
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Old 01-05-2019, 06:44 PM   #42
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Default Re: Feit electric LED lamp autopsy.

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Originally Posted by stj View Post
IMO the best bulb was from philips, but they discontinued it for cost reasons.
it used blue/uv led's with a special phosphor loaded plastic casing.

the casing was relativly cool so the phosphor didnt degrade like it does on "white" led dies.
I beg to differ. Switch LED bulbs are the best. The only real downfall is the uneven light distribution pattern. Otherwise they are very well built, the electronics are housed in a cast aluminium finned case that acts as a heatsink, and the LEDs are oil cooled. I got one that has been in service for 5 years now and shows no signs of failure.
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Old 01-05-2019, 10:47 PM   #43
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Default Re: Feit electric LED lamp autopsy.

I can't find a really bright LED bulb anymore, that is a reasonable price.

I gave up and bought Ali "12W and 18W aluminium LED bulb" for the workbench.
Inside is bead LED's on MCORE pcb, a dangling taped up SMPS. Something you can repair or mod at least and decent heatsinking.

The light is a bit narrow spot and lots of chromatic aberation (yellow donut), and cold blueish colour temperature. It's like all chinese LED lamps. Does not run too hot. The 12W is better than the 18W for quality of light, smoother more even spot.

You can buy just the LED's, MCORE PCB, heatsink, or a kit etc.
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Old 01-06-2019, 08:47 PM   #44
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Default Re: Feit electric LED lamp autopsy.

Apparently, not just for LEDs, the brighter, at least past a certain point, the lower the CRI! And thus, a trade-off. Thus, for brightness or for better CRI.
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Old 01-07-2019, 02:09 AM   #45
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Default Re: Feit electric LED lamp autopsy.

22 years life? Warranty, please!
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Old 01-08-2019, 02:59 PM   #46
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Default Re: Feit electric LED lamp autopsy.

Ikea LED bulbs have a 1 year warranty, nothing extended. Blink flicker flicker
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Old 01-08-2019, 07:20 PM   #47
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Default Re: Feit electric LED lamp autopsy.

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Ikea LED bulbs have a 1 year warranty, nothing extended. Blink flicker flicker
Weird! Because I heard good things about LED light bulbs from Ikea before, at least on an older article, with their "Ledaire" series?

I now think that they were possibly discontinued and replaced with an inferior version! Looks like shit's hitting the fan for Ikea!

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Old 01-09-2019, 10:59 PM   #48
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Default Re: Feit electric LED lamp autopsy.

Ikeas LED bulbs are not as good as they used to be, i have an old 9.5w 600lm LED bulb i got from Ikea (for around 7$ which was a pretty good price at the time i got it) and it still works to this day after 5 or 6 years of near daily sevice in an enclosed fixture. However, i've seen their newer LEDs fail in their display cases.
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Old 01-09-2019, 11:09 PM   #49
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Default Re: Feit electric LED lamp autopsy.

Ikea Ledare is their "high end" LED bulb, and RYET is the economy line. Almost the entire lineup is warm white 2700K. The way they fail slow flickering, it is the LEDs and heat.
Dimmables have an electrolytic capacitor.
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Old 01-10-2019, 03:53 PM   #50
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Default Re: Feit electric LED lamp autopsy.

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Ikeas LED bulbs are not as good as they used to be
I had a feeling that a person was going to say that they regressed!
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