Light can be created with command createVehicleLocal with special vehicle class "#lightpoint"
for example:
_light = "#lightpoint" createVehicleLocal pos;
_light setLightBrightness 1.0;
_light setLightAmbient [0.0, 1.0, 0.0];
_light setLightColor [0.0, 1.0, 0.0];
_light lightAttachObject [_object, [0,0,0]];