SetLightIntensity & setLightBrightness cannot be used together otherwise the previous effect will be wiped out by another command.

e.g.
_li setLightBrightness 2;
_li SetLightIntensity 10; // With the result that the light brightness was reduced, so brightness is useless at present.

_li SetLightIntensity 10;
_li setLightBrightness 2; // Intensity set makes no sense, neither can we find any visual difference after brightness set.

Two commands should be an implementation to each other on visual presentation, otherwise they shan't be used togethr to the same light source.