Author Topic: LED LIGHTS. Any good flicker free ones?  (Read 8043 times)

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Offline james_s

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #50 on: January 22, 2023, 11:12:31 pm »
You could add heat sinking to the inner bits of a regular off the shelf bulb. Back in 2012 I bought 6 of the first <$5 LED bulbs to appear on the market, disassembled them and mounted the LED boards on a 10" aluminum disk of about 1/4" thick I got out of the scrap bin at my friend's machine shop. I glued the driver boards to the underside and then attached the completed assembly into what was a 2D fluorescent torchier lamp that the ballast had blown up on. I figured I'd get a couple of years out of it but now more than a decade later it's still working just fine, it's the main light source in my living room and gets used hours virtually every day. About 3 years ago I installed a Shelly dimmer flashed with Tasmota into it in place of the switch so now it mostly gets run somewhat dimmed. I suspect it is mostly the improved cooling that has led to such exceptionally long life.
 
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Online Psi

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #51 on: January 23, 2023, 11:51:39 am »
This type of LED lamp is quite good too, spreads the heat out really well.
I have them in my garage.
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Offline madires

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #52 on: January 23, 2023, 02:09:38 pm »
BTW, the 'LED starter' is simply a fuse. And that fuse is a good idea in case the LED retrofit is suicidal. So far I had two retrofits go bang.

I would consider it a design flaw that the retrofit lamps don't have a fuse built in. Every screw in LED or CFL bulb I've torn down had either a fuse or a fusible resistor.

The PSUs of the two broken retrofits had fuses. The problem is that you never know until you take them apart. :D Anyhow, the broken retrofits are upcycled with 12V LED strips for workbench lighting. They are nicely made with an aluminium profile and acrylic glass.
 

Online thm_w

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #53 on: January 23, 2023, 10:37:40 pm »
The funny thing is though is that I have a requirement for a 6500k bulb, this is a work area scenario.

The ergonomics of that workspace look horrific:
- A bright light right in front of your face causing hot spots bouncing off various equipment on the side
- PC blocking your legs from moving around
- A desk thats too low for the chair requiring you to hunch over

6500k is not a "requirement" for a work area.
https://www.ikioledlighting.com/blogs/cct_led_lights
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Offline Zucca

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #54 on: January 24, 2023, 03:38:56 am »
Did not read the entire thread, so if it is already mentioned I beg for mercy.

Please,  Lord have mercy on my I am a sinner, if you are illuminating the Lab with LED

DO NOT use cheap ass LED driver/bulbs from china!


I did, they looked and felt okay in my hands.... but when I turn them on my scope can't trigger anymore in a stable way.
They crap my entire Lab with EMI like an AM radio tower from the '60.

No it's not noise from the mains lines, it's something related to the secondary and no matter how many C or L I out on the output it is always there.
Since they were slim design, they did not care about the loop area after the high voltage trafo...
Yes I tried with ferrite clamps but it's like curing a cancer patient with orange juice.
Yes I tried with alu tape, but no joy.

Tons of video on YT, this is the one I like the most



EDIT: I just bought some nice and $$$ Mean Well RSP series PSU.... I let you know how they goes....
« Last Edit: January 24, 2023, 05:01:51 am by Zucca »
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Can't love what you don't know. Zucca
 
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Offline madires

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #55 on: January 24, 2023, 11:21:22 am »
It's not rocket science to build your own customized table or work bench. Just saying. ;)
 

Online themadhippy

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #56 on: January 24, 2023, 12:41:06 pm »
Quote
It's not rocket science to build your own customized table or work bench.
indeed,and looking at the picture id be tempted to rotate the work space 90 degrees,might end up with a smaller space buy you gain a solid wall for shelf to get a lot of stuff up ff the bench

 
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Online thm_w

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #57 on: January 24, 2023, 10:52:32 pm »
Also hunching over is what people who are 6ft 7 do best. I'm not sure how to solve this except get a taller table. The chair as it is now is adjusted for my leg length and for my legs to touch the floor comfortably.

Yes lab benches are very common at any sort of electronics, chemistry, assembly workplace. They are really tall, and chairs will have adjustable rests for your feet:
https://www.atvilla.com/AT-Villa/Photography/Ergolab/Ergolab_059.jpg

But if you just want a small desk, an adjustable height unit is another option. Thats what I use at home, was about $200 though.
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Offline james_s

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #58 on: January 26, 2023, 05:56:53 pm »
The biggest issue with magnetic ballasts is flicker, especially in 50Hz areas. They do tend to be more reliable though.
 

Offline rdl

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Re: LED LIGHTS. Any good flicker free ones?
« Reply #59 on: January 26, 2023, 08:20:35 pm »
Back in the nineties the lab where I worked was remodeled. The contractor wanted to replace most of the fluorescent lights with new ones that had electronic ballasts. My boss refused to have them, claiming he could hear a hum from the newer type. I couldn't tell any difference but we ended up keeping the old fixtures after all. Probably saved a lot of money too.
 
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