I do not know if there would be a difference or not , or even if they make a #168 bulb but the 168 are 4.94 watts, and the #194 bulb is 3.8 watts , and the #158 is only 3.6 watts.
I don't know what the wattage of #2825 is either. I can say my panel lights up just as it should for what it is considering its year model and the amount of light found everywhere else in the interior.
