I had some 80/100 watt Xenon bulbs in my car for a little while. I thought they were brighter, but it turns out they really werent, the light color was just a bit whiter is all.
At first they seemed much brighter, but after taking into consideration the warnings about using higher powered bulbs, I switched back, and since then I have not noticed any difference in light output.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.