NC 'custom' LED lights retrofitted?

[Phil Martin]

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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