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

["nick_towers2000" <nickt@xxxxxxx>]

and me...

Nick

--- In ukha_d@y..., "i.bird@t..." <Ian@M...> wrote:
> >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@y...]
> 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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