W
warren upchurch
- Jan 1, 1970
- 0
I have run across an unusual situation a few times in the last few years.
Usually in a plastic sign, I will see 3 out of 4 lamps lit and one doesn't
appear lit. This is on a 4 lamp series start ballast. When you remove the
lamp that is not lit the others go out, and replacing the lamp results in
all 4 lit. Any ideas as to what causes this?
Thanks
Warren
Usually in a plastic sign, I will see 3 out of 4 lamps lit and one doesn't
appear lit. This is on a 4 lamp series start ballast. When you remove the
lamp that is not lit the others go out, and replacing the lamp results in
all 4 lit. Any ideas as to what causes this?
Thanks
Warren