A method of converting a line voltage to an RMS load voltage in a lamp includes modulating a load voltage with a pulse width modulation circuit that is entirely within the lamp and provides an RMS load voltage to a light emitting element of the lamp. The bands being extendable in loops from the bracket around a tree. The color switch or filter includes a first filter section for selectively blocking green light and including a cholesteric filter, a quarter wave plate and a liquid crystal switch. For example, the resistivity can be controlled in the range of 260 to 800 ohm-cm. The first controller is adapted to match the first link speed to a second link speed of a second port of a first controlled device that is connectable to the first controller.