Author Topic: EEVblog #728 - T4 LED Lighting  (Read 24368 times)

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Offline SeanB

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Re: EEVblog #728 - T4 LED Lighting
« Reply #50 on: March 30, 2015, 04:34:14 pm »
That would be on the part left dangling on the wall. The unit splits in 2 parts with 4 screws holding it together. While there is no earth bonding wire from a dedicated post joining the 2 halves, the mirror itself and most of the acessible parts are either glass or acrylic.
 

Offline ConKbot

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Re: EEVblog #728 - T4 LED Lighting
« Reply #51 on: March 31, 2015, 02:30:17 am »
Whoa whoa whoa, are you certified electrician Dave? You have to know what youre doing before you go mucking about with mains devices!

What do you think it is, America, where homeowners are allowed to change their own wall outlets willy-nilly?   :-DD ;)
 

Offline VK3DRB

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Re: EEVblog #728 - T4 LED Lighting
« Reply #52 on: March 31, 2015, 12:33:31 pm »
He only uses those from a reputable wholesaler in Melbourne who imports quality approved drivers which are also RF quiet. More expensive than eBay crap, but money well spent.
Not necessaraly so much more expensive. E.g. the Meanwell LPH-18-12 is under 8EUR has real EC and you get a data sheet which promises safety standards as TUV EN60950-1,TUV EN61347-1,EN61347-2-13, IP67 approved; design referred to UL1310 Class2, CAN/CSA No.223-M91;
EMC immunity compliant to EN61000-4-2,3,4,5,6,8,11, EN55024, light industry level, criteria A; EMC emission compliance to EN55022 (CISPR22),Class BEN61000-3-2 ClassA, EN61000-3-3

I had a Meanwell 48V PSU go *BANG!* when it was just lying idle on a bench powered with a normal load. A filter cap had exploded for no apparent reason. At least Meanwell meant well. I mean, lets face it, they mean well.

Even so, Meanwell are not too bad at the low end. I would trust Meanwell over Yoo Kat Dung brand any day. Especially in the home.
 

Offline Slothie

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Re: EEVblog #728 - T4 LED Lighting
« Reply #53 on: April 01, 2015, 08:48:13 am »
It's got a CE mark, so that means its good, right?  :)
 

Offline Kjelt

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Re: EEVblog #728 - T4 LED Lighting
« Reply #54 on: April 01, 2015, 09:08:37 am »
I did not see any ground leads on the supply or inside the lamp fitting, this would be a requirement if your bathroom circuits are protected with an ELCB.
Yeah saw the same thing, would always do that in a bathroom esp with chinese PSU.  :P
Although the fixture is hanging outside reach it is good practice, but I do not know what the australian rules are in this case.

Concerning T4, never before heard of it, T5 is pretty much the standard here and you can see that there is less and less supply (and demand) now led is gaining ground.
And still the TCO, Lumens/Watt and lifetime of TL's is still pretty competitive with 20000 hours lifetime for the TL tube itself and 80000 hours for the electronic driver (or iron copper ballast if you wish) and only €2,50 for a replacement tube LED is way way more expensive.
The lifetime of the tube is influenced by how many start/stops you make but the same is true for the led electronics  ;)
« Last Edit: April 01, 2015, 09:14:05 am by Kjelt »
 

Offline elgonzo

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Re: EEVblog #728 - T4 LED Lighting
« Reply #55 on: April 01, 2015, 09:59:52 am »
It's got a CE mark, so that means its good, right?  :)
It is as good as oval-shaped circles. :)
« Last Edit: April 01, 2015, 10:05:17 am by elgonzo »
 

Offline richfiles

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Re: EEVblog #728 - T4 LED Lighting
« Reply #56 on: May 27, 2015, 09:52:05 pm »
I wonder, can a second strip be attached to the top piece of glass (the panel that faces the ceiling)?

I ALWAYS over engineer stuff... That is such a perfectly simple a solution.  :-+


What do you think it is, America, where homeowners are allowed to change their own wall outlets willy-nilly?   :-DD ;)

But I like my willy-nilly outlets! I even take the time to do it RIGHT, unlike the almost half my fellow 'Muricans that get it right by the simple sheer probability of getting the hot and neutral right 50% of the time... The other outlier are the ones who screw up so bad they catch shit on fire or blow a box, or make a live ground, or some other horrifying deathtrap!  |O
 


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