A modular lighting system features a universal mounting method for lighting elements, such as LED lights, as well as various electrical devices, and is configurable in multiple modes of operation. According to one aspect of the present invention, a caster system that support portions of a stage apparatus which has a reaction frame and a stage assembly includes a first caster component and at least a second caster component. The additive includes a copolymer with a vinyl polymeric backbone that includes at least one free radically polymerizable vinyl monomer A and at least one reinforcing comonomer B, wherein B is present at 0 to about 20% by weight of the copolymer, and a pendant polysiloxane monomer grafted to the backbone. , with a jaw pressure of 20 psi for 0.