Not sure if the light configuration and units for a 23-2 has the same as my 30, but I changed out all my lights to LED, not only for longectivity but also to save battery power. For my mast I used the following.
LED - Warm White - STEAMING LIGHT FS-42-12
LED - Cool White - ANCHOR LIGHT TW-GE-15
LED - Warm White - DECK LIGHT - BA-15-12X
Steaming / Mast deck Light
Anchor Light
I hope this helps you.