Cheap, Nasty Chinese Floodlights

[The Natural Philosopher]

One man anstisocial light polluter

[The Natural Philosopher]

[charles]

It may depend. Rememeber these are an array of LEDs - not one big one. Certainly the theatrical ones seem to deliver what one migh expect and the CPC 50w ones aren't far different from a 500w halogen - to the eye. I don't run to a light meter.

[Dave Plowman (News)]

You didn't read the bit where Charles said they were lighting a large area

- a car park, then? No surprise there.

[Dave Plowman (News)]

How does it compare level wise?

I have some 30 watt ones here. Not as bright as the 150w halogen they replaced. But just about adequate.

[charles]

Please explain how else you light a car park.

[charles]

At home a 10w one is ample for my drive.

[Peter Parry]

They are 100W consumption eg

and are indeed quite bright claiming 8500 Lumens and 600W incandescent equivalent wattage.

[Archibald Tarquin Blenkinsopp]

I suspect that they are not the full 100W. I will measure the wallymitts when I install the next one. Leaving a "fogged" one on for a few hours has no effect on the vapour deposited inside the glass.

I would expect 100W to get the vapour on the move again, but it does not budge.

They are bright but don't seem to be excessive.

Regards

AB

[Archibald Tarquin Blenkinsopp]

You are probably right. I just had visions of the thing trying to pull a vacuum when there was a dirty great drop of water nestling on the hole.

Again a small bit of actual thought and it's bye bye to the breather tube :-)

Once again, many thanks.

AB

[Huge]

So?

[Huge]

Blimey.

[The Natural Philosopher]

u dont

[Andy Burns]

Mine's too young to judge.

[Andy Burns]

No it's just a lie, even a closer to the truth 30-50W LED is brighter than a 100W incandescent; all my 250W halogens burn-out decades ago, but the 30W LED seems roughly equivalent from memory.

[The Nomad]

It _is_ I have a 'torch' with one.

Yes 100W 3.3A @ 34V

Very steam punk looking :-)

Avpx

[Theo]

The trick with these cheap '100W' chip-on-board LED panels is that many of the LEDs don't work. Because they're so bright, you can't tell. If you put the LED panel on a variable voltage supply and wind it up, you can see the point where some LEDs light and some don't, before it gets too bright to notice.

The more expensive panels have all the LEDs light - I suspect the cheap ones are the factory rejects.

Theo

[Andy Burns]

and if one or two have failed in a single string on the COB, the remaining ones will be fed by higher voltage, so will be more likely to fail, and on and on