Here's a quick write-up about the effects that freezing, heat and light have on finished beer:
The Impacts Of Freezing, Heat and Light on Beer
http://www.beersyndicate.com/blog/impacts-freezing-heat-light-beer/
Cheers-
The Impacts Of Freezing, Heat and Light on Beer
http://www.beersyndicate.com/blog/impacts-freezing-heat-light-beer/
Cheers-