How is the movement of particles in diffusion determined?

Diffusion is driven by the concentration gradient and kinetic energy of the particles/molecules that move in random motion and collide with one another. Diffusion is the movement of particles/molecules from an area of high concentration to an area of low concentration. Diffusion process continues until the particles/molecules are evenly distributed in the whole available space.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.