From what I've seen, you WANT to raise your bottles up to 70-72* for carbonation.
When seaching around this site for that same answer, most people quoted or linked to this: http://www.homebrewtalk.com/f35/bott...ebrewer-94812/
You COULD leave them cooler, but just know that it will take longer to carb and waiting is hard enough! (as I still have yet to crack into my 1st batch)
Fermenting: Wet Hop IPA
Drinking: DIPA 2.0, Amber Ale 2.0, Citra Pale Ale, Coffee Milk Stout, Brown Ale, Session IPA, Black IPA, Pale Ale, Amber Ale, Blonde Ale, IPA, DIPA, Oatmeal Milk Stout, Red IIPA