5mm wide angle lens shows brightness and brilliant colors with a unique style. Our concave lenses are 3/16″ high. Non-replaceable (SEALED) bulbs. 70 light strings have a 12″ lead wire. 100 light strings have a 4″ lead wire. 4″ bulb spacing Multi-function controllers available on some strings allow for steady on, combination, in waves, slow glow, flash and slow fade.