Network electricity: this includes national network electricity and network electricity of local management. Normally, network electricity has to transfer from electric power production stations to consumption places through high-voltage wires and transformer stations to increase/reduce the voltage. Households who use electricity from local electric generation stations for lighting are also counted as using network electricity. If the household uses network electricity for lighting, the enumerator marks (x) in the small box next to code "1";

Generator electricity: this includes electricity released by generators using petrol/gasoline or water power (small hydro-electric plants). Households who use electricity from electric power-generated stations (including thermo- and hydro- electricity) which were constructed by individuals and sold for their use, are also counted as using "generator electricity". If the household uses generator electricity for lighting, the enumerator marks (x) in the small box next to code "2";

Kerosene: If the household uses kerosene/petrol for lighting, the enumerator marks (x) in the small box next to code "3";

Gas: If the household uses gas for lighting, the enumerator marks (x) in the small box next to code "4";

Other: this includes households who use fuels for lighting different from those listed above (candles, caster-oil/kerosene lamp, wood, etc.); the enumerator marks (x) in the small box next to code "5". He/she then fills in the name of that fuel in the space above the printed line.