Spehro Pefhany wrote:
>
> >I would also like to see the white LED lighting topic
> >explored further, high initial costs don't bother me

> http://www.philips.com/themes/led/
> They are thinking it might be practical for general lighting in ~5 years,
> not bad IMHO. As they say, the best of the white LEDs are now more
> efficient than ordinary incandescents, so it boils down to further
> improvments in efficiency (hopefully to surpass flourescents) and reducing
> the cost.


Hi Spehro, if you haven't done so yet have a
play with a 6000mCd white led. I have one running
at only half power (25mA) that is a very effective
flashlight.

I can't believe Philips' claims of "not efficient yet"
i'm sure a hundred of these leds running from 240vac
would still only draw 50mA and give as much (or more)
light as a 60w bulb drawing 250mA.

I really don't see an efficiency issue, just an initial
cost issue.

And they make awesome "point lights" for looking down
in PCB crevices etc. Mine give more light at 2 inches
than a 40w 4 foot fluoro tube at 2". One of these days
I will take a picture of our point lights and put it
up on the net; 5x 110mAh NiCd, a stick, a switch,
a resistor and a white led.
One of the most useful tools I have ever built.
-Roman

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