Hi Nelson,

"Nelson" wrote in message

The most obvious test would be to replace the bulbs. That would
eliminate the ballast as the problem. Sorry if you tried that already,
but you didn't mention it. Fluorescent bulbs don't last forever :-)

Yes, tried new bulbs - but it did not work. Was hoping that there is
resistance check, or voltage.

I did do the normal web search and found some info, bo in all cases it says:
replace the ballast.
In fact I already did that and lights do work now. Ballasts are about $16
each locally to cover 2 bulbs.

Bonus question: Several places on the web mantioned that a ground
connection to the fixture is essential for the lights to work. These have
worked for 10 years without the ground - the original installer did not
bring good ground to the lights.

Will lack of ground reduce the life of the ballasts?

RichK