D8 and D9. Main source of energy: Ask the respondent what the main source of energy is for lighting and cooking for member of the household. If there is more than one source of energy you should record only the main one (the most frequently used one).
You should fill the appropriate code for the main source of energy for cooking in column D8 and that for lighting in column D9. Remember that you should not leave any of these items blank, even if the codes for cooking and lighting are the same.