Don Phillipson wrote:
The fluorescent lamp on a Kenmore Model 250 stove (now
20 years old) has started wrecking new fluor. tubes
(Sylvania, 22-inch, 18 watts). Symptoms a
1. Dark grey bars appear at both ends of the new tube
within 5 min. use.
2. Tube lights only at the two ends (dark in the middle
for 18 inches.) One end shows white light, the other pink light.

What does this mean?

Hi,
The tube is worn out.