I am installing a New T8 Single tube ballast to replace an older ballast. The new ballast has one black wire, one white wire, two blue and one red. The old ballast has two wires coming and going from bulb mounts. How should I wire the new ballast?
The new ballast should've come with a wiring diagram. It might even be printed on the ballast itself.
In general I think most (all?) T8 ballasts have blue wires going to one end and red wires going to the other. Are you replacing a T8 ballast or something else? T12s are wired differently so make sure to follow the new ballast's wiring if you are replacing an older one.
I found this video that might help you out: https://www.youtube.com/watch?v=zLvawsR5xyE
And if you prefer PDF documents on the subject, this one from GE is pretty good: http://www.gelighting.com/LightingWeb/na/smartcatalogs/Lighting_and_Ballasts_Section_10_Ballasts_T8_Instant_Start.pdf Much more than you want, I bet, but look on page 10-61 and there are wiring diagrams for various ballasts.