I explicitly turn them on when I need them - like on the dark side of a planet or in a planet's shadow while wandering the rings. However, I use one of the modes of my X52 as "approach mode" - configured with more fine thruster control and stuff. The macro configured to trigger when I roll the stick into that mode toggles the gear and lights and configures power such that I have 4 pips to shields and few enough assigned to engines that full throttle with the gear deployed doesn't take me over the speed limit. Leaving the station, rolling out of that mode toggles the gear and lights back and configures everything for normal flight. I've avoided "close encounters " with another cmdr in the slot before now because my lights made my (black) ship more visible.