How many lightbulbs are energy-saving?
[Figures are omitted]
The first answer includes lightbulbs that are inside or outside the dwelling, in roofs, walls or lamps, regardless of the type: incandescent, energy-saving, halogen, among others. Then, ask the second question, which only takes into account the energy-savings lightbulbs. Check that the number of energy-saving lightbulbs is equal to or less than the total number of lightbulbs in the dwelling. If dwelling has no energy-saving lightbulbs, record "0".