I can imagine FDev have wanted us to see the attention to detail they have done in creating the cockpits/bridges of the ships they have created, and, while I do appreciate the hard work, I do understand why Players want to turn the lighting down. As a result of this, I have tried to come up with a reasonable set of solutions for this. I am going to separate mobility lighting (lights that allow you to move around the ship) from instrument lighting.
Mobility lighting. When a ship has landed (regardless of WHERE it has landed) the lighting to allow people to move around their vessels will be at 100%. However, when the ship is in flight this will change, depending on whether it is a single person ship or a multi person ship. If you are in a small, single pilot ship the mobility lighting will turn off (it can be turned back on by lowering the landing gear combined with turning on the landing lights). However, if you are in a multi-person ship (two or more flight positions) the mobility lights will drop to 25% (dark enough to no longer be a distraction, but enough light to allow movement around the ship, for the immersion factor).
Instrument lighting. This has a sensor to compensate for the background light levels (such as when near to a star, or a very long way away from any light source). However, these lights will also have levels specific to certain conditions. When docking clearance has been granted the instrument lighting will be at full power. In combat they will be at 50%, while when in Silent Running they will be at 25%.
I know that these do not cover all options, but I think they are reasonable.