cfl's

CFL's Just found out how to get enough light out of em. just bought a 75 watt bayonet monster.

Reply to
F Murtz
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or replace them with led's

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Reply to
atec77

Not bright enough. I want a 250w one ;)

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Reply to
kreed

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Yes that is more like it but they did not have any.

Reply to
F Murtz

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I have a pair of 100W LEDs here, just don't have the circuit to drive them.

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Reply to
Mickel

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**The specs list the power requirements, which are easy enough to implement. If I were you, I'd be fr more concerned about dealing with the heat. Those emitters will dissipate more than 50 Watts each.
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Trevor Wilson
www.rageaudio.com.au
Reply to
Trevor Wilson

Would it be possible from 12V? A 240V circuit is available so no point reinventing the wheel but there is nothing for 12V.

Apparently a Pentium 4 heatsink is enough and I have plenty of those sitting around.

Reply to
Mickel

ment.

probably, depending on the specs (which I don't know) but if it is

100w device (compared to claims that it will give equivalent output to a 100w incandescent) , you will need about 9a @ 12v

ose

You would want to have the fan running too, and absolutely excellent thermal bonding to the LED. 50w is a lot of power to dissipate particularly in such a small device.

Reply to
kreed

lement.

If you need to run it off 12v, like a battery or car type install, looks like you would need to step it up to the 32-36v required. Otherwise you will need to use a mains supply to provide the voltage required. This would be a pain as power supplies with this output are not commonplace.

Those

Reply to
kreed

**Possible, but dumb. Use a 36 Volt supply.
**As others have said, you'll need VERY good bonding and a fan. Look for a heat sink with better than 1.5 degrees C/Watt (at a minimum!). 1 degree C/Watt would be better. LEDs lose efficiency as temperatures rise.
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Trevor Wilson
www.rageaudio.com.au
Reply to
Trevor Wilson

oatley electronics sell a cfl inverter that runs of 12 vdc and can operate up to 100w worth of 240 v cfl`s.

If you need to run it off 12v, like a battery or car type install, looks like you would need to step it up to the 32-36v required. Otherwise you will need to use a mains supply to provide the voltage required. This would be a pain as power supplies with this output are not commonplace.

Reply to
no one

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Power supply is easy:

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Power dissipation is still going to be a problem in the LED mount.

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Regards,

Adrian Jansen           adrianjansen at internode dot on dot net
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Reply to
Adrian Jansen

You are - and apparently always will be - absolutely clueless on these matters. Always default to simplistic PC environmental opinions, for some reason.

I wonder where 'Dr Karl' got his info from, or whether he bothered to verify it for himself? It's sounds highly exaggerated to me. How much particulate escapes depends on so many factors...

Using wood for fuel releases the same amount of carbon had that same piece of wood been left on the ground to rot... albeit it releases all that carbon in a very short time when burnt.

I'll happily keep running my wood heater(s) and combustion stove until I keel over and cark it. It's none of yours or anyone else's damned business.

That's one way to put it. Have you not noticed that our entire 'government' was 'privatised' years ago?

Reply to
Jeßus

**I specified my source for the information. I can certainly attest to the disgusting smoke on a still night in my area, where there are a tiny handful of fires burning. I'm lucky. The smoke doesn't bother me, but I pity those who have breathing difficulties.
**Indeed, which is why he specified a high end, modern fireplace.
**You may care to read what I wrote. I carefully excluded the CO2 effects, for precisely that reason. Decomposition, however, does not release combustion products that can be harmful to those who have breathing problems.
**Nice attitude. Fuck everyone around you, as long as you're OK. Is that about it?
**Yep.
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Trevor Wilson
www.rageaudio.com.au
Reply to
Trevor Wilson

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I have ordered that supply already but I also wanted to run it off 12V.

That part will be interesting. :-)

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Reply to
Mickel

How do I do that in the car? :-)

It could be interesting. 50W of power is similar to a computer CPU and those don't run very long without a fan :-)

Reply to
Mickel

You can also get cfls that work direct off 12V. I have some in a shed on a property and they are excellent. 3 x 25W units light the 6x6m shed very nicely. Usually I just run the one light.

That bit I figured out for myself :-)

That I'm not so sure about. Trevor said it would be easy tho :-)

Reply to
Mickel

Fireplace? I don't know of any one who burns wood that has a fireplace.

Reply to
terryc

r a

A low powered desktop CPU :) Some of them quote 90-140w, and in the case of an IC, AFAIK, almost all of that is lost in heat.

Kind of like getting 1-2 50w soldering irons, (though the top of a CPU probably has a much smaller surface area than a soldering iron tip and shaft) and getting them to stay below about 50 c when running continuously. Think of the heatsink area it would need without a fan.

Reply to
kreed

Type of wood, how green is it (if at all), how much moisture it contains, the weather itself and of course the fireplace/wood heater/stove characteristics would all make a difference.

Indeed.

Not really. My nearest neighbor is about 2KM away, who also uses wood for heating and cooking... which brings us around to another thing I take issue with - your generalising about banning fires. The notion of _not_ using wood heaters here (NE Tasmania) is simply absurd :) Most urban areas are another matter... but then theres no end to the problems living in such places. I'm just glad they all do in fact live there and not in the bush...

Reply to
Jeßus

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