I would not be concerned about how bright the light is.
As far as tubes being in upright positions, I pay less attention to the angle while I do want to be sure that it is snug in place. If the tube is tight and comfortable, you will be too.
As far as tubes being in upright positions, I pay less attention to the angle while I do want to be sure that it is snug in place. If the tube is tight and comfortable, you will be too.