# 3.9.5 Lighting

## Utility Functions

guPosLight - Pseudo-represent positional light.
guPosLightHilite - Pseudo-represent positional light.

## GBI Commands

gSPSetGeometryMode - Set the geometry pipeline mode.
gSPClearCeometryMode - Clear the geometry pipeline mode.
gSPLight - Load light to the RSP.
gSPLightColor - Change the light color of the RSP quickly.
gSPNumLights - Specify the number of the light structure that loads to RSP.
gSPSetLights - Load the light structure to the RSP.
gdSPDefLights - Load the parameter that defines a light to the light structure.

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Last Updated March, 1999