4-Pin lamp minimum starting temperature is a function of the ballast. Most ballasts are rated with a minimum starting temperature of 50 degrees F (10 C). Ballasts are also available that provide reliable starting to 0 degrees F (-18C) and -20 F (-29C).
Based on 60Hz reference circuit.
Fluorescent lamp lumens decline during life
Life ratings based on rapid start operation. On instant start ballast, life rating is 25% lower.