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Unbranded LED retrofit lamp teardown 3: The Driver I got two of these 18w 1200mm 5800k unbranded LED retrofit lamps with an LED Lightpack which I got to convert back to MCF. I have no use for them so I decided to open one and see what makes it tick. I used unreasonable force to open it so it's pretty much scrap but they were screwed together. Here you see the quite compact switch mode power supply that lives in the endcap at one end of the lamp. The other end is empty. The driver outputs 144v DC which adds up when each LED's is dropping 3v and is being ran about 1.25 ma. There are 96 LED's in the lamp, mounted in two parallel sets of 48 LED's in series. Note the graduated degree markings on the end cap, the lamp pin section pulls out slightly to unlock and then can be rotated so that when installed in a fitting the side which emits light can be properly orientated. It was all screwed together but I just pulled it all apart lol

Unbranded LED retrofit lamp teardown 3: The Driver

I got two of these 18w 1200mm 5800k unbranded LED retrofit lamps with an LED Lightpack which I got to convert back to MCF.
I have no use for them so I decided to open one and see what makes it tick. I used unreasonable force to open it so it's pretty much scrap but they were screwed together.

Here you see the quite compact switch mode power supply that lives in the endcap at one end of the lamp. The other end is empty.
The driver outputs 144v DC which adds up when each LED's is dropping 3v and is being ran about 1.25 ma.
There are 96 LED's in the lamp, mounted in two parallel sets of 48 LED's in series.

Note the graduated degree markings on the end cap, the lamp pin section pulls out slightly to unlock and then can be rotated so that when installed in a fitting the side which emits light can be properly orientated.

It was all screwed together but I just pulled it all apart lol

IMG_8227.JPG IMG_8235.JPG IMG_8236.jpg macro.jpg pcledmod.jpg
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Filename:IMG_8236.jpg
Album name:FrontSideBus / Solid State
Filesize:2729 KiB
Date added:04 Mar, 2019
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Slyspark   [04 Mar, 2019 at 03:32 PM]
Yup, sadly this really is the kind of shit replacing quality fluorescent Sad
FrontSideBus   [04 Mar, 2019 at 03:42 PM]
It's not as bad as I was expecting tbh. At least it has a proper power supply instead of the standard capacative dropper that you see in most of the cheap GLS replacements and the LED's themselves aren't being hammered.
Slyspark   [04 Mar, 2019 at 03:49 PM]
It's still not as good as a wire-wound ballast and tube tho! Laughing But yea, I've seen worse - like the ones I'm removing in bulk atm which give you a cracking shock if you touch the metal back of the tube.
FrontSideBus   [04 Mar, 2019 at 04:26 PM]
You're right there of course, can't beat good old fluorescent. Getting shocks off lamps is not good at all! Be interesting to see inside to see whats causing that!
Slyspark   [04 Mar, 2019 at 04:48 PM]
Yes, I must smash a few up - not worth the effort if actually undoing the screws, as you found. Probably the type that no screwdriver actually fits anyway.
FrontSideBus   [04 Mar, 2019 at 04:52 PM]
I'll be keeping the LED strips tbh, might come in handy for some porject even though the colour is a bit cold.
Slyspark   [04 Mar, 2019 at 04:54 PM]
I've just been dumping the ones I remove in the skip. Horrid things.
Danny   [04 Mar, 2019 at 05:19 PM]
Disgusting things.
oliver   [04 Mar, 2019 at 05:34 PM]
Agree
Ash   [04 Mar, 2019 at 06:17 PM]
Even the worst of the Chinese stuff have mostly went away from the capacitive droppers now. Does not make it any better
AngryHorse   [04 Mar, 2019 at 08:03 PM]
The rotating cap are, at least a good idea, a lot of LED tubes don’t do this Confused

Comment 1 to 11 of 11
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