List down 4 units of light and define it shortly.   2. Briefly explain the 3 types of lamps.    3. Out of all the lights discussed, write the best energy efficient light and explain why.

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.