What Is the Difference Between SPT-1 and Spt-2?

Jason Geiman

Published on: 18/02/2024

When shopping for Christmas light strings, you might have noticed the SPT-1 and SPT-2 specifications. You'll especially see these terms when shopping for C7 and C9 Christmas bulbs and cords. But do you know the difference? Let's explore! Keen to learn how the insulation thickness of Christmas light cords impacts safety and efficiency?