vector vColor = <1.0, 0.0, 0.0>; //Light-options.
float fRadius = 10.0;
float fFalloff = 0.62;
float fMaxIntensity = 0.5; //Maximum intensity of the light.
float fTimer = 0.02; //Refresh rate (seconds).
default
{
    state_entry()
    {
        llSetTimerEvent(fTimer);
    }

    timer()
    {
        float fIntensity = llFrand(fMaxIntensity);
        llSetLinkPrimitiveParamsFast(LINK_THIS, [PRIM_POINT_LIGHT, TRUE, vColor, fIntensity, fRadius, fFalloff]);
    }
}