In sports fields the heavy light sources are used which covers large range of areas compared with other sources of lights.Floodlights are mainly used in sports stadiums,it provides most of its light from the electric arc within a small discharge tube. It is becoming increasingly popular due to its good quality white light and good efficiency.These lamps uses mercury vapor to create the powerful light but includes other metals to improve the color.When the lamp is turned on current passed through the starting electrode and jumps the short distance to the main electrode this is aided by argon gas.