Re: Kill LED lamp flicker

Sep 08, 2023 Last reply: 3 years ago 16 Replies

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Ricky 3 years ago

> I recently changed the overhead fluorescent lamps for LED replacements. > >

> > Very soon, I noticed they were flickering a lot more the the old > > fluorescents.
> Use a dimmer designed for LED lighting. They will typically
> also have a "dimmer low end" than conventional dimmers.
> LEDs that flicker on a simple switched line are probably of
> poor quality.

I bought an LED lighting fixture and the dimmer specified on the package as compatible. It wasn't. It was all crap. I contacted the manufacturer and their response was to return the product. They don't care. They sell you gold on the box, but crap in it.

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Lasse Langwadt Christensen 3 years ago

some are linear, enough LEDs in series to add up to most of the rectified line voltage

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Lasse Langwadt Christensen 3 years ago

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John Larkin 3 years ago

No, that's too expensive. Many have a current-limiting IC and no energy storage. The current actually flows near the AC line peak.

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John Larkin 3 years ago

Get a clear-glass Edison type LED lamp. You can see the parts down in the base. There's no big cap, no inductor.

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John Larkin 3 years ago

Does Philips still sell LED bulbs? They had some really good ones that aren't available any more. I'd expect they can't compete with the Chinese stuff.

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Lasse Langwadt Christensen 3 years ago

lørdag den 9. september 2023 kl. 17.01.11 UTC+2 skrev John Larkin:

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Lasse Langwadt Christensen 3 years ago

lørdag den 9. september 2023 kl. 16.55.02 UTC+2 skrev John Larkin:

the cap is usually down in the thread metal part

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whit3rd 3 years ago

And consumer commodity bulbs don't have to be dirt cheap? These type lamps

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certainly are 'enough LEDs in series' and not much else; there's no ROOM for more parts than that.

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Lasse Langwadt Christensen 3 years ago

looks like this Philips one

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is a buck converter, schematic here:

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Lasse Langwadt Christensen 3 years ago

it's grade C which in the pre 2020 rating would have been better than A++

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Lasse Langwadt Christensen 3 years ago

there is seval types of Solhetta bulbs

the filament one is (new) grade C

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Martin Brown 3 years ago

They were made like that presumably to be as cheap and nasty as possible. When they worked they were fine and instant on with true rated brightness unlike the previous generation of CFLs which came on dimly and almost never reached the brightness that their packaging claimed.

That was their undoing. I expect you can still buy them on fleaBay.

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Lasse Langwadt Christensen 3 years ago

derating also significantly increases efficiency, at the cost of needing more leds for the same light output

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albert 3 years ago

No it is not, as long as efficiency means lumens/watt. Two times as many leds cost two times as much obviously, but the leds components are dirt cheap and vanish completely with the price of total energy consumption.

Groetjes Albert

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Martin Brown 3 years ago

Unfortunately consumers look at the headline initial price to buy and ignore the running costs. That means that the cheapest and nastiest ones sell in the greatest quantities even if they are less reliable.

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Lasse Langwadt Christensen 3 years ago

Dubia had Philips design LED bulbs using 2-3x as many LEDs to increase efficiency and life and madated that the only allowed type of bulb aka. Dubai lamp

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