Some fixtures state that they are only for 40 watt bulbs and will not
work with 34 watt bulbs.
Dan





"Peter Reilley" wrote in message ...
I had a better look at the light fixture. There is no ballast transformer,
only two
plastic boxes that have two wires attached. There is no label giving
wattage
rating. The original bulbs say F40CW and "made in USA", no brand name.

The new (bad) bulbs say Philips Econ-O-Watt F40CW/RS/EW 34 watt USA.

If I swap the remaining old but good bulbs around, the fixtures work OK.

Pete.