Had a fluorescence light ballast go bad, light would not come on at all. I bought a ballast from Lowes and installed it. the fixture has two tubes (the u type t8 tubes). now only one tube will work. I bought a new tube to replace the one that would not work, it did not work either. I move the working tube to the bad side and it works fine (in either side). trying to figure this out I tried moving the tubes around. what I got: 1: good tube works fine in either side by itself with no other tube in other side. 2: bad tube works fine by itself in either side without a tube in other side. 3: new tube works but dim in either side without tube in other side. only one tube will work. ballast supplies power to both sides. I have all the blue wires wired together and both the red wires wired together, just like the old ballast. I have changes ballast before without problems, including lots at where I worked at back in the seventies( they worked on 277v ac, one side of 440 three phase to ground). I am thinking the new ballast is bad. any opinions?. Thanks.