Gradual On for Lamp I dislike the rude assault you get when you flip on a light switch. Instead of an abrupt on-off switch on a 120 V circuit, I want something that gradually turns on. In other words, you throw a control switch and the resistance in the load's circuit goes from infinity to zero in the span of, let's say, three seconds. The load would be a 500 W incandescent lamp. Is there a commercially available product that could accomplish this? Or is there a simple way to make this circuit?