In one aspect, a fuel cell assembly comprises a plurality of fuel cells. One method includes selecting an optical path having a plurality of nodes from a database defining an expected optical network. A modulation control device in accordance with the present invention evaluates the transmission quality of a frequency channel and if acceptable, the modulation control device phase divides the frequency channel. Uses for such a device include, but are not limited to, interactive lighting effects for people at clubs or events, interactive advertising displays, etc. A desired financing time horizon is selected for each loan. The method includes obtaining a first clip and a second clip, and forming a molding material around the first clip comprising a first surface and the second clip comprising a second surface.