Nikon D780 Reference Manual page 135

Option
I [Fluorescent]
[Sodium-vapor lamps]
[Warm-white
fluorescent]
[White fluorescent]
[Cool-white fluorescent]
[Day white fluorescent]
[Daylight fluorescent]
[High temp. mercury-
vapor]
5 [Flash]
K [Choose color
temperature]
L [Preset manual]
Description
Use under fluorescent lighting; choose
the bulb type according to the light
source.
Use with studio strobe lighting and other
large flash units.
Choose the color temperature directly.
Measure white balance for the subject or
light source or copy white balance from
an existing photograph.
Camera Controls
89