Firefly Christmas Lights Warm White 600 LEDs Green cable Total length: 20.5m Lit length: 15.5m Mains powered Indoor & outdoor use Traditional Firefly Christmas Lights 600 - Warm White | P037225 The Festive 600 Traditional Warm White Firefly Lights are perfect for lighting up your home this Christmas. These lights feature a flickering flame effect with half of the bulbs static while the rest flicker with the bulbs tightly spaced, just 2.6cm apart.