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

["Aidan Williamson" <fluff@xxxxxxx>]

Any idea on the beam angle for these?

A lot of the high output have a very narrow beam, which could limit the
applications.

A.


> 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. ?
>

Yahoo! Groups Sponsor

ADVERTISEMENT

For more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.