Fluorescent phenyl xanthene dyes are described that comprise any fluorescein, rhodamine or rhodol comprising a particular C9 phenyl ring. For a first implementation, a heuristic algorithm uses a scaling phase that iteratively adjusts a maximum arc capacity, determines the resulting tree for the iteration, and selects the tree as the routing tree that provides the maximum flow. The first connection apparatus and the second connection apparatus are matched together to form and define a third winding tube. The wheels in the center line have a coefficient of friction that is lower than the coefficients of friction of either of the outer lines of wheels. The method includes a step for providing a network access to a mobile station by the access network. A method includes providing a lighting fixture having a unibody housing with a flat back portion and beveled sidewalls, the housing being structured to receive a lens-holding door, and sealing a perimeter of the lighting fixture to the wall or ceiling with a continuous bead of security caulk.