Originally Posted by Rooz
the connection isn't great on them, meaning the power/voltage the ballast is creating, not all/enougth of it is flowing to the DDE's to warm them up quickly to get them to be at full potential...
I really doubt that is the problem. Ballasts tend to not work very well in the cold unless they are designed for that application. If it were the connections then they wouldn't work in summer either or wouldn't work well as they get older. Put a florescent light out in the snow and see how well it starts up.