Changes the factory 10 degree spot to a 10 degree x 30 degree flood * Wide angle lens spreads the beam out horizontally so light is not wasted in the sky were you don"t need it * Sized to fit the Magicshine MJ-808/808E/808U or Gemini Titan (39mm dia.) * Also fits most Magicshine copies (The so called CREE LED Bike lights) * Easily installed, Takes just seconds