Add this script to your layout.
Default functionality - Sets the phong angle for selected objects to 30 degrees
Shift + Click the icon to choose your own angle for the selected objects.
Sorry for no audio - too noisy in the office to record proper sound.
I'll refine the script with undo functionality and suggestions welcome.
If you find this script useful add something to the tip jar...
Download ica_SetPhong: cl.ly/0p28440M173l