Typically the life of an electrolytic capacitor is given at maximum temperature. A good rule of thumb for Axial leads and Radial Crown capacitors is to double the life for every 11 to 12 degrees of temperature reduction (series dependent). For example if one requires a life of 80,000 hours at an ambient temperature of 80oC, a capacitor with 6,000 hours life at 125oC will suffice. A capacitor rated for 2,000 hours life will not do.