Question about Game Mechanics/Possible Bug

[hollyfant]

There's also the matter of "Light Blindness" (Drow, Grey Orcs) vs. "Light Sensitivity" (Duergar). As I recall, Light Blindness is bugged but Light Sensitivity works just fine.

[SwordSaintMusashi]

Ah, true. I tested with a drow, so it was Light Blindness.

[Sandermann]

Actually this very thing was addressed in the novels about drow

As said before, novels are not rule books and are not bound by the 2.5 ruleset.

Narbondel is the name of the column that 'lights' up Menzoberranzan, but it is lit by heat not light

The 3.5 FRCS:Underdark says that the Narbondel is lit once per day by Gromph Baerne using creeping fire from bottom to top, you are referencing 2E material which links to infravision. Infravision does not exist in the 3.5 ruleset.