> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of RussellMc
> Sent: 21 July 2010 14:10
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE]:: HID lamp controllers
> 
> >>I'd be interested in hearing anyone's experiences with HID lamps
> 
> ...
> 
> > Take a look at aftermarket automotive HID upgrade kits - they come
with
> nicely packaged ballast and
> > igniter units e.g.
> >
> >
http://shop.ebay.co.uk/?_from=R40&_trksid=m570&_nkw=hid+kit&_sacat=See-
> All-Categories
> 
> Yes, thanks.
> One arrived today :-)
> This one
>              http://www.jaycar.co.nz/productView.asp?ID=SL336
>      (Not at that price).
> 
> I got H3 due to the small bulb size.
> H4 is available dippable (with compromises) whereas all others are
> single beam per bulb.
> 
> Alleged 3200 lumen - which it should manage at 35W as figures well
> above that are said to be available.
> 
> Dimmability is one issue and spectrum compared to sunlight for PV use
> is another. How equivalent it is and how it compares to LED for my
> purpose is to be seen. "Real people" use Xenon flash, track the
> decaying light and do a whole load curve in a single flash. My
> experiments along those lines suggest they know some things that I as
> yet don't know. I'd like to try that again some time. But for now the
> DC-light approach will probably suffice.

Beware the surge current from those ballast units when switched on, the
inverter draws a lot of current to strike the lamp!  Even though they
are only 35 Watts continuous, a lot of these units have problems
starting when plugged into original car wiring.

Mike

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