you might try setting the model brightness down 30%. Most people will not be able to discern that the brightness has changed.
Or change the brightness slider and lock it down to 70 or so. Now when you randomly create effects, every effect will only go to a max of 179 instead of 255.
It will reduce the total power drawn by your show.
We send full values of 0-255, if you change the model brightness by -30%, the exact same sequence will be scaled to be 0-179 (255 reduced by 30%)