This Low and No Down Payment: Mortgage option information on low and no down payment mortgages. -901 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 audit michigan " and "are magnets used in electric motors " (include "home energy efficiency inspection", "how much does a solar power system cost ", "how electric eels produce electricity ", "home energy assistance program new york ", "permanent magnet motors free energy ", "Dc generators for windmills ", The emerging clean energy economy is creating well-paying jobs in every state for people of all skill levels and educational backgrounds. & Efficiency of solar power plant )