You're not going to be able to use either of those lens for high school lighting. You'll either need a fast zoom or a good prime(which is a much better choice) for poor lighting and faster shutter speeds.
If you go back and read my original post again, you will see that I was not asking for a long zoom for gym lighting. I thought I was clear that I already own an 85 1.8 for that purpose, and I also have the 17-55 2.8 which could be used if the lighting is sufficient.
I was asking for opinions on those two lenses for the occasional outdoor wildlife type shots. It's not my primary focus.
I settled on the 55-250 for cost reasons. I've had mixed results so far, but I'm still learning.