LED UV emissions?

W

Wayne.

Guest
Just curious, but does an off the shelf white or blue LED emit any UV of
a usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the
cost of one UV LED, I can by a bag of 10 ultra white or ultra blue LEDs.
 
"Wayne." <abuse@hotmail.com> wrote in message
news:49af2242$0$4204$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Just curious, but does an off the shelf white or blue LED emit any UV of a
usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the cost
of one UV LED, I can by a bag of 10 ultra white or ultra blue LEDs.
Click to expand...
**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job. I've used them in place of unobtainable cold
cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106


--
Trevor Wilson
www.rageaudio.com.au
 
In message <718p11FjvespU1@mid.individual.net>, Trevor Wilson
<trevor@_SPAMBLOCK_rageaudio.com.au> writes
**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job.
Just be careful not to overdrive them or you might get smoke on the
Click to expand...
water.
I've used them in place of unobtainable cold
cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106
Click to expand...
--
Clint Sharp
 
Trevor Wilson wrote:
"Wayne." <abuse@hotmail.com> wrote in message
news:49af2242$0$4204$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Just curious, but does an off the shelf white or blue LED emit any UV of a
usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the cost
of one UV LED, I can by a bag of 10 ultra white or ultra blue LEDs.

**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job. I've used them in place of unobtainable cold
cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106
Click to expand...
For the cost of one from Farnell, I can buy 10 blue/white LEDs.
 
"Clint Sharp" <clint@clintsmc.demon.co.uk> wrote in message
news:5gwlmyEl+4rJFwCR@clintsmc.demon.co.uk...
In message <718p11FjvespU1@mid.individual.net>, Trevor Wilson
trevor@_SPAMBLOCK_rageaudio.com.au> writes
**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job.
Just be careful not to overdrive them or you might get smoke on the water.
I've used them in place of unobtainable cold
cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106



--
Clint Sharp
Click to expand...
Very sharp! :)
 
"Clint Sharp" <clint@clintsmc.demon.co.uk> wrote in message
news:5gwlmyEl+4rJFwCR@clintsmc.demon.co.uk...
In message <718p11FjvespU1@mid.individual.net>, Trevor Wilson
trevor@_SPAMBLOCK_rageaudio.com.au> writes
**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job.
Just be careful not to overdrive them or you might get smoke on the water.
Click to expand...
The "stupid with a flare gun" inspired the only good single they ever did!
 
"Wayne." <abuse@hotmail.com> wrote in message
news:49b06b74$0$4201$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Trevor Wilson wrote:
"Wayne." <abuse@hotmail.com> wrote in message
news:49af2242$0$4204$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Just curious, but does an off the shelf white or blue LED emit any UV of
a usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the
cost of one UV LED, I can by a bag of 10 ultra white or ultra blue LEDs.

**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job. I've used them in place of unobtainable cold
cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106



For the cost of one from Farnell, I can buy 10 blue/white LEDs.
Click to expand...
**You asked about UV, not white or blue. If you want UV, use a UV LED.


--
Trevor Wilson
www.rageaudio.com.au
 
"Trevor Wilson" <trevor@_SPAMBLOCK_rageaudio.com.au> wrote in message
news:71de16FkfqrjU1@mid.individual.net...
"Wayne." <abuse@hotmail.com> wrote in message
news:49b06b74$0$4201$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Trevor Wilson wrote:
"Wayne." <abuse@hotmail.com> wrote in message
news:49af2242$0$4204$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Just curious, but does an off the shelf white or blue LED emit any UV
of a usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the
cost of one UV LED, I can by a bag of 10 ultra white or ultra blue
LEDs.

**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job. I've used them in place of unobtainable
cold cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106



For the cost of one from Farnell, I can buy 10 blue/white LEDs.

**You asked about UV, not white or blue. If you want UV, use a UV LED.
Click to expand...
You obviously didn't read what the OP said!
 
"ian field" <gangprobing.alien@ntlworld.com> wrote in message
news:cBfsl.49377$PT2.1045@newsfe11.ams2...
"Trevor Wilson" <trevor@_SPAMBLOCK_rageaudio.com.au> wrote in message
news:71de16FkfqrjU1@mid.individual.net...



"Wayne." <abuse@hotmail.com> wrote in message
news:49b06b74$0$4201$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Trevor Wilson wrote:
"Wayne." <abuse@hotmail.com> wrote in message
news:49af2242$0$4204$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Just curious, but does an off the shelf white or blue LED emit any UV
of a usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the
cost of one UV LED, I can by a bag of 10 ultra white or ultra blue
LEDs.

**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job. I've used them in place of unobtainable
cold cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106



For the cost of one from Farnell, I can buy 10 blue/white LEDs.

**You asked about UV, not white or blue. If you want UV, use a UV LED.


You obviously didn't read what the OP said!
Click to expand...
**I did. He clearly failed to read what I wrote. You want UV, use a UV LED.
I don't know how much UV is delivered by a blue or a white LED. I do, OTOH,
know that a UV LED delivers UV. A UV LED may deliver 10 (or 100) times the
amount of UV that a white or blue LED delivers.

It seems simple enough. He wants UV light, he uses UV LEDs.


--
Trevor Wilson
www.rageaudio.com.au
 
For them who don't know, Ledsales in Melbourne's got a good range
of LEDs including UV ones pretty cheap e.g.
http://www.ledsales.com.au/cart.php?target=product&product_id=246&substring=uv
 
"Bob Parker" <bobp.deletethis@bluebottle.com> wrote in message
news:49b1d0e3$0$4187$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
For them who don't know, Ledsales in Melbourne's got a good range of
LEDs including UV ones pretty cheap e.g.
http://www.ledsales.com.au/cart.php?target=product&product_id=246&substring=uv
Click to expand...
**Nice one Bob. Thanks for the link. I haven't tried these guys. Their
prices are pretty good.


--
Trevor Wilson
www.rageaudio.com.au
 
On 7/03/2009 14:06 Trevor Wilson wrote:
"Bob Parker" <bobp.deletethis@bluebottle.com> wrote in message
news:49b1d0e3$0$4187$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
For them who don't know, Ledsales in Melbourne's got a good range of
LEDs including UV ones pretty cheap e.g.
http://www.ledsales.com.au/cart.php?target=product&product_id=246&substring=uv

**Nice one Bob. Thanks for the link. I haven't tried these guys. Their
prices are pretty good.
Click to expand...

I've bought quite a lot of stuff from Lance there. Excellent LEDs
and other things at good prices, in my experience. :)
 
On 2009-03-06, Wayne. <abuse@hotmail.com> wrote:
Trevor Wilson wrote:
"Wayne." <abuse@hotmail.com> wrote in message
news:49af2242$0$4204$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
Just curious, but does an off the shelf white or blue LED emit any UV of a
usable level?

I use a CFL for UV exposure, but it is a PITA to set up, and for the cost
of one UV LED, I can by a bag of 10 ultra white or ultra blue LEDs.

**Even better, you can buy UV LEDs. They're not really UV, they're deep
purple, but they do the job. I've used them in place of unobtainable cold
cathode UV tubes.

Jaycar ZD-0260
Farnell 105-7106

For the cost of one from Farnell, I can buy 10 blue/white LEDs.
Click to expand...
I seriously doubt that any blue/white ones emit more than a 2% UV.
but check for yourself farnell have links to data-sheets (and
most of them work)

wikipedia says UV is wavelengths smaller than 400nm, and a quick
search of a different site found no datasheets for visible light leds
that emit a measurable amount of UV

AIUI UV LEDs are made out of a different semiconductor to those used
for visible LEDs.
 
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