"Saml" wrote:
We've just ended a heat wave in Virginia--dropped recently to about 50f at
night, so it's not the cold...

Turned out to be the switch. I bypassed it and all the lights came on.

Thanks--appreciated the suggestions. I don't think of switches going bad.

The likelihood of a bad switch is inversely proportional to the technician's
expectation of functionality

- corrolary to Murphy's sixth law

Jon