At 11:25 AM 7/1/01 -0500, you wrote:
>You all might be interested in this info.  www.kisantech.com has headlamp
>modulators and they claim to use a P-channel mosfet using current regulation
>for the modulation.  150 watts maximum.  It's a very small package that
>modulates current between 100% and 13% (I guess so the filament doesn't cool
>too much)  It also has a light sensor to deactivate the modulation upon
>entering a tunnel or darkness.

If you read the relevant standard that someone posted a link to, the
light sensor is a required feature. It must also have a way of bypassing
the modulator (presumably a mechanical switch) in case of failure.

Best regards,


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