As a veteran of many years of nite " fighting " as my friend calls it here are some of my observations.
1. Black is an excellent color to use at night So is purple.
2. Glow does work but think subtle easy to get overkill and fish avoid ( too unnatural )
3. Crappie have good night vision but not excellent say like a walleyes. So sometimes a little bigger profile works better
4. Lakes that have super clear water USUALLY have a better night bite than day bite.
5. Submerged light do attract fish but not from miles away ( as some ads say ). Think near vicinity.
6. Spots that are too snaggy to fish in daytime may be tried by anchoring near it and letting the lights do their magic. They will leave cover a lot more readily at night.
7. Off topic but two reasons I like to night fish Sunrise and Sunset. Two of the days prettiest times.
Garminarmin gpsmap 1040 xs networked with Garmin gpsmap 1242 xsv , Panoptix PS 30 and PS 31. Livescope LVS 32
Ice rig Echomap Ultra 106SV with LVS 12 and GT10-IF