RE: Re: RE: White LED Lighting... was RE: Re: ADSL vs Cable

["i.bird@xxxxxxx" <Ian@xxxxxxx>]

The blue pathway LED's are 1000mcd at 20ma so much brighter for the most
part. The view angle is 16 degrees.

Ian B

Original Message:
-----------------
From: Frank Mc Alinden armagh@xxxxxxx
Date: Wed, 24 Apr 2002 20:28:57 +1000
To: ukha_d@xxxxxxx
Subject: Re: RE: White LED Lighting... was RE: [ukha_d] Re: ADSL vs
Cable


Are these as bright as your pathway Leds Ian?
Frank Mc
  ----- Original Message ----- 
  From: i.bird@xxxxxxx 
  To: ukha_d@xxxxxxx 
  Sent: Wednesday, April 24, 2002 8:20 PM
  Subject: RE: RE: White LED Lighting... was RE: [ukha_d] Re: ADSL vs
Cable


  >as an aside, if we don't get a European supplier, is anyone
interested in
  >chipping in for some of the LEDs from Computronics. I think it
works out at
  >about 60p each. ?

  Me, me me

  Ian B



  Original Message:
  -----------------
  From: Ian Lowe ian@xxxxxxx
  Date: Wed, 24 Apr 2002 10:00:23 +0100
  To: ukha_d@xxxxxxx
  Subject: RE: White LED Lighting... was RE: [ukha_d] Re: ADSL vs
Cable


  yeah,

  I found a company in korea doing MR14 MR16 sized replacements for
the small
  Lv Halogens, in 20W equivelants. These were clusters of 15 LEDs,
each
  producing about 3Cd..

  Since digging more and more, I found a maglite like torch quiting a
42
  Candela output in white, using THREE LEDs!! it was also 100,000 year
(Ten
  Years continuous use) LED life, and about 100 hours on three AA
cells..

  so I had a further rummage, and found what I believe to be the
highest rated
  white LEDS available on the market now...

  12 Candela units, from computronics in Australia. (they are selling
a bag of
  500 for about ?300 + shipping)

  The bizzare thing for me is this:

  the 2500mcd ones use 20mA at about 3.8V optimal..

  And the 12000mcd ones, despite being nearly five times brighter use,
er,
  20mA at about 3.8V

  I'm totally smitten!!

  The idea of having a cool crisp light (I like a slight blue tint at
the best
  of times, so the lack of any "red" component doesn't
bother me) that can be
  used with normal usage patterns for 25 years and uses about
>ONE< Watt in
  place of a 50W Halogen, whilst producing an equivelant 80W light
level is
  pretty amazing..

  I'm having ideas of totally cool under cupboard lighting, but having
twice
  as much light for about 4% of the leccy... :)

  more research required...

  as an aside, if we don't get a European supplier, is anyone
interested in
  chipping in for some of the LEDs from Computronics. I think it works
out at
  about 60p each. ?

  Ian



  -----Original Message-----
  From: paul_watkin [mailto:paul_watkin@xxxxxxx]
  Sent: 23 April 2002 20:31
  To: ukha_d@xxxxxxx
  Subject: White LED Lighting... was RE: [ukha_d] Re: ADSL vs
Cable


  Nichia have the brightest white LED's on the market at about 6.4cd
in
  a T1 3/4 package or 3.2cd in T1

  http://www.nichia.co.jp

  Not sure who in Europe holds a disty franchise for Nichia though,
try
  Arrow, EBV somebody like that. I'll try and find out who it is
  tomorrow.

  Other companies to look at are Panasonic, Lumiled (Agilent and
  Philips Joint venture to replace the lightbulb with led's) and
also
  Agilent Technologies.

  Although you would probably need an account with somebody like
Arrow
  or EBV to get access to stuff from the above suppliers.

  Regards

  Paul

  --- In ukha_d@y..., "PatrickLidstone"
<patrickl@t...> wrote:
  > >
  > > Due to really awful search functions (and every
electrical
  appliance
  > > containing LEDs), I can't find details.  There is a
3mm LED on
  the
  > Maplin
  > > site
  > > (http://maplin.co.uk/products/details.php?
  > cartid=0204231835361451415&modulec
  > > ode=&moduleno=17821&manufacturer=Nichia).  I
based my thoughts on
  > the
  > > variety of LED torches around.
  >
  > Rapid Electronics do a separate opto-electronics catalogue
-
  probably
  > worth a gander.
  >
  > You'll find full tech specs on RS (Radio Spares) and
Farnell
  websites
  > for a huge range of LEDs.
  >
  > Patrick



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