When it comes to choosing a shaft, Is deflection the only factor?

[HawaiianEye]

I hate them with a passion. They blind me when I'm down on a shot, and also when I'm just walking around the room not even playing. Their diffusers let half the light go sideways into my eyes. The egg-crate style diffusers on the Littman and Diamond and even the Gold Crown lights from the 2000's control the light much better, letting it go down but not sideways.

I hate ceiling lighting.

I like a dark room with the lights hanging directly over the table.