This Make certain that fuel cans are stored properly. -295 The incandescent bulb is designed to operate at high temperatures. At normal operating temperatures, a tungsten filament has a resistance nearly 20 times its room-temperature resistance. So when a bulb is turned on, it draws a current nearly 20 times the normal current until it warms up. This current surge is called the inrush current, which lasts for 30-100 milliseconds. Again, something different from the dumb load point of view. Thus, 5 100 W bulbs in parallel, which would consume just 500 W in normal circumstances, will have a inrush load of more than 10000 W. More importantly, a huge current flows, and it is important that all components on the line can carry the current. For larger lamps, a small current flows to keep it at a reasonable temperature, called the keep alive. "home energy use survey " and "how solar power energy works " (include "home energy audit maine", "how concentrated solar power works ", "magnetic motor cars ", "how do solutions conduct electricity ", "home heating systems energy efficient ", "Magnetic overunity motor ", Green Energy Development and the use of Renewable applications for our every day usage. & Generator in power station )