On Oct 2, 2004, at 8:18 AM, Mark Jordan wrote:

>>> Would it be possible to design a circuit
>>> to use fluorescent bulbs with a broken filament?

Most CCFL drivers will drive a regular fluorescent bulb at the
driver-designed wattage.  There's a picture of one of those
cheap TDK (?) inverters driving a CFL bulb here:
     http://homepage.mac.com/westfw/PhotoAlbum12.html
It runs 600mA at 4 to 6V; probably 2W or so to the tube.  It's
not bad for a hack...

Most "instant start" ballasts probably do not use the filament
anyway; they use a high voltage generator to start the arc...

BillW

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