I've found that, at least for me, the "lime green" lights that illuminate the panel markings cannot be turned on during daylight hours, no matter how dim the outside light may actually be. If I set the time of day to dusk the lime green lights will appear along with main panel lighting. These lights are activated by clicking the center button on the Master Bright knob. So I guess these lights work, but with most of my other planes I can turn them on during the day if the light is dim. Hope this helps.

P.S.-- expat, how do you insert an image into a post on this forum?