By sending a current through mercury and inert gas to fill the operating light of fluorescent lamps for production. Various sizes, including compact fluorescent lamps, fluorescent tubes and circline light fluorescent lamps. Fluorescent lamps cost less to operate than incandescent bulbs and last longer.
  Comparative cost
You measure the watts of a light bulb, it produces in the lumen of the amount of light generating capacity. You measure the effectiveness of a lamp, divided by the watts lumens lumens per watt, is sometimes called. The exact cost per watt depending on the electricity price in your area, but you can compare different lighting effects, to determine which is more effective.
  Calculation of costs
If you know the kilowatt hours of electricity prices, you can calculate the exact cost of operating fluorescent lamps. Determine daily use, light daily average number of hours multiplied by the light tile of tile. Then multiplied by 365 divided by 1000 an annual kilowatt use. Multiplied by the cost of each kilowatt-hour to determine your annual operating bulb cost. For example, suppose you use a 28 watt lamp five hours a day. This is equivalent to an annual 140 watts per day and 51,100 watts, which is equivalent to 511,000 kilowatts. If the cost of 12 cents per kilowatt-hour, light costs about $ 6.13 a year.