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Hi Ian
Would
make
nice garden lites ,are they in Melbourne ?
Frank Mc
----- Original Message -----
Sent: Wednesday, April 24, 2002 7:48
PM
Subject: RE: White LED Lighting... was
RE: [ukha_d] Re: ADSL vs Cable
It does, doesn't it...
well, I have contacted
computronics for some more details.
Looking at 12Candela 5mm LEDs in
a
water clear package. forward current is
30mA, voltage nominally 3.6V,
and
22 degree half power angle..
Cost is A$820 AUD, about ?305 GBP so
far
but I have asked about multiples..
in the meantime, if anyone finds
a
UK/EU source, holler please ;)
Ian.
-----Original
Message-----
From: Scott Crowther [mailto:scrowther@xxxxxxx]
Sent:
24 April 2002 10:09
To: 'ukha_d@xxxxxxx'
Subject: RE: White LED
Lighting... was RE: [ukha_d] Re: ADSL vs Cable
sounds like a
bulk
buy to me...
Scott Crowther
Intamac Systems Ltd
t:
+44 (0)1604 679262
e. scrowther@xxxxxxxw.
www.intamac.com
-----Original Message-----
From: Ian Lowe
[mailto:ian@xxxxxxx]
Sent: 24 April 2002 10:00
To:
ukha_d@xxxxxxxSubject: 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
?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@xxxxxxxSubject: 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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