Fluorescents are a stock feature that old people seem to get caught up in without knowing any better. GI are the lights that are under plastics that are basically always on for General Illumination. They are run off of AC power and look really weak(think 1950s EM) when left as fluorescent. It makes the game feel old and give some people like me a feeling of 1951. The feature lights are the ones under the inserts that can be controlled individually by the CPU. For those I suggest cleaning all of the inserts from the bottom side to get rid of the black dirt. At that point the frosted LEDs will be bright enough and you'll never want weak fluorescents in your game again.
So basically I am recommending zero Fluorescents for the machine...
Matt