Light Artillery damage isn't affected by either "Capsule Turret Damage Bonus" or "Artillery Turret Damage Bonus". I'm not sure if this is intentional, but it's currently the only turret not affected by a damage upgrade, and it seems fair for capsule damage bonus to apply. The Capsule Launcher and Light Artillery fire the same ammo, but even before infinite levels of tech, the light artillery will only be doing 1/4 the damage of the capsule turret (2.80x damage on the Capsule Launcher, Light Artillery stuck at 0.75x)
