Originally posted by ExodusCloak
I'm not sure...he can most probably. But that's doesn't that necessarily mean he thinks at light speed in his human form.(He didn't look like he showed any lightspeed reflexes in those scans) Maybe once he converts his body into light then he develops some sort of heightened thinking. Surge from the New X-Men for example as she absorbs electricty her mental thought processing and speed increases. And pre-upgrade Northstar and Aurora IRRC altered their thought processing according to their speed.
He sure as hell shot the shit out of superman. He even comments how superman is not faster than he is.