> -----Original Message-----
> From: Roman Black [SMTP:fastvid@EZY.NET.AU]
> Sent: Thursday, 4 January 2001 23:56
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [EE] Phase control dimming on a cheap pic
>
> Alan B. Pearce wrote:
> >
> > >I was lucky to get those - guy the same day bought the whole
> > >lot they had in stock to make helmet lamps for cavers and
> > >visitors to the glow-worm grottos
> >
> > One of my work colleagues here in the UK does this as well, though only
> for
> > himself. He also uses them on his pushbike - provides enough light
> around dark
> > English country lanes to stop you from running into a hedge or off the
> road. He
> > tends to use little switch mode regulators from Maxim to up the voltage
> so he
> > can run them of a single AA battery. He has a small flashlight that he
> has
> > mounted 3 LEDs in instead of the single bulb. The light is brighter than
> the
> > bulb, and the battery draw lower!
>
> Yep, the amount of light is amazing, especially
> considering power usage. Perfect home lights,
> when the price drops. I can imagine different
> "warm" color options, in super-energy efficient
> lights that last forever. Uncle Roman's future
> prediction. ;o)
>
        Uhm, don't most LEDs dim down by about 40% as they age?  You'd have
to accommodate the deteriation into any 'long-life' lighting device (slowly
increase max operating current at each switch on?).

        Bye.

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