However, the path the current takes is quite unpredictable. Even a small amount of current can kill you if it flows through your heart. Larger currents can cause tissue damage and burns. A person who survives a lightning strike has been lucky enough to avoid the current flowing through critical organs and causing deadly damage. Sometimes these people have also experienced indirect hits, where the lightning actually strikes an object near them.
Close strikes can also be deadly.
Switching an incandescent bulb has no material effect on its life. Therefore, unless these bulbs are installed for lighting effects, you're better of turning them off when not in use. The useful life of fluorescent lights, on the other hand, may be shortened by frequent stopping and restarting. Several government and industry sources suggest that turning off fluorescent lights won't save money if someone will need them on again within a few minutes. This international system is the modern metric system of measurement.