but they save energy. How much energy would be expelled to tear down a burnt house and build a new in in its place, with bulldozers, electricity for saws cutting lumber-painting the house, gas for trucks to bring the supplies, all materials needed for the house (shingles, lumber, carpet, siding, bricks, windows, insulation, wires, appliances, furniture, sheetrock)...
...but the flourescent bulbs save energy.