I know it's Christmas day. . .

I have noticed that the light color output on the right side of the tank is much yellower than the left side. I switched the bulbs and it seems to be even yellower. I have not been able to switch the connections to the ballast (hard to get to). I'm running XM 250W mogul base 10K bulbs which are know for being bright white. Does this sound like a ballast problem?


Dave-