[Phys-L] Sunlight Brighter Than The Sun???

["Folkerts, Timothy J" <FolkertsT@bartonccc.edu>]

Here is a link to Nature that seems to claim to be able to focus sunlight on the earth *even* *brighter* than the sunlight leaving the sun (72 MW/m^2 vs 64 MW/m^2.  This would seem to me to be a violation of the 2nd Law of Thermodynamics.

It comes from the University of Chicago, which is is pretty reputable place.  Any thoughts?

http://www.readcube.com/articles/10.1038/346802a0?locale=en