Perfect for a 4 - 6ft Christmas tree. These are reliable and safe lights. 117 Clear bright bulbs 6v 0.75w, 3 fuse lamps 6v 0.7w, 2 spare lamps provided. Lamp spacing 15cm (6"), length of lights 18.14m (59.5ft), Lead length 1.5m (5ft), Rating of light set 90W approx. A fantastic set of lights.