None. First, denounce the nearest Democrats as liberal pantywaists who deliberately caused the bulb to blow. Second, announce that the Bush administration has proved that the science of electricity is faulty, so no action ever needs to be taken on global light change. Third, keep the need for a new light bulb strictly secret. Fourth, use the money for new light bulbs as an excuse for another tax cut for Bush's wealthy friends. Fifth, explain that you would never "disassemble" about the need for light, you are way too busy spreading freedom and democracy in the Middle East by eliminating freedom and democracy in the United States.
Four. One to change it, one to sing about how heartbroken he is at the loss of the old one, one to sing about how madly in love he is with the new one, and one to go "Yee-Hah!" and throw his cowboy hat in the air.