NC 'custom' LED lights retrofitted?

[don.broadus at exeloncorp.com]

The white LED is amazing in its brightness, the blue /violet LED's are
brilliant in color . I haven't found the Nichia green yet. I bought the book
"The Blue Laser Diode" by the Nichia inventor of the blue/green and blue
laser diode. expensive book but very interesting. 

> -----Original Message-----
> From:	Phil Martin [SMTP:phil at muts.freeserve.co.uk]
> Sent:	Tuesday, January 30, 2001 8:06 PM
> To:	diy_efi at diy-efi.org
> Subject:	Re: NC 'custom' LED lights retrofitted?
> 
> I work for a company that use thousands of led's a week from HP led's in
> red
> , amber and also Nichia white, green and blues. You have to be careful
> when
> buying these as they come from different bins and the brightness can vary
> hugely. I have some 15 degree white LED's that are good enough for a small
> torch.
> 
> All the led's have a life of aprox 127 years at 20mA except for the white
> which are at half brightness after 18 months continuous. This is because
> thay are essentially a UV led with a white phosphor and the UV kills the
> plastic.
> 
> Run them all at 30mA and you should have no problems under nearly any temp
> conditions.
> 
> 
> ----- Original Message -----
> From: "Pat Ford" <pford at qnx.com>
> To: <diy_efi at diy-efi.org>
> Sent: Tuesday, January 30, 2001 3:14 PM
> Subject: RE: NC 'custom' LED lights retrofitted?
> 
> 
> > To make matters worse the leds current requirements are temp dependent.
> >
> > Previously, you (don.broadus at exeloncorp.com) wrote:
> > { it is going to be very hard to get cost in line on even on a group
> buy.
> The
> > { best thing to do is get a bunch of third brake light bars from the
> junk
> yard
> > { and use the high brightness leds off of these. Most red Leds have a
> view
> > { angle of only 15 degrees or so. The new white Leds have a view angle
> of
> 135
> > { degrees but are $2 each.  You can bust out the glass of the old 1157
> bulb
> > { and group 3 leds for
> > { running and 3 for brake light. The current limiting resistors control
> the
> > { brightness
> > {
> > {
> >
> >
> > --
> > Pat Ford                           email: pford at qnx.com
> > QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> > (613) 591-0931      (voice)         mail: 175 Terence Matthews
> > (613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M
> 1W8
> >
> >
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