DuraDrive 33 ft. 12/3 SJTW Lighted Triple Tap Power Extension Cord. Our special Pro Glo SJTW (300V) jackets offer high visibility for safety underfoot and extra flexibility in cold weather. Each male plug has a built in amber neon light which indicates that there is power in the cords and outlet. In addition, these extension cords provide Continuous Current and Ground Monitoring (CGM) an OSHA safety requirement. A green neon light in the female connectors lets you know at-a-glance that there is ground continuity.