The Philips site says up to 80% more light,, this would be good for a H11 upgrade but from what i can find its only available in a H7 for our cars .. or they only have plans for a H7 because i have not seen them anywhere.
http://www.nam.lighting.philips.com/us/automotive/products/xtremepower.php
http://www.nam.lighting.philips.com/us/automotive/products/xtremepower.php