A Light Emitting Diode tube socket, an adaptor and an assembly thereof, which includes tow sockets capping either end of a LED tube. A time interval may be randomly allocated on the chip, for processing the randomly selected one of the plurality of data processes. Embodiments of the present invention including steerable access sheaths or introducers may provide cardiovascular access for various ablation tools and devices for the performance of various ablation procedures or procedures involving alternate energy sources. With this construction, the polychromatic yarn dyeing apparatus decreases a space for installation and conducts continuous and repetitive dyeing operations with a unit pattern having unique color, width and arrangement. The latter is aligned relative to the optical element and controllable in such a way that the gas is directed by the gas directing device towards the optical element. The transverse force has a magnitude sufficient to cause bending of the drive shaft in the direction transverse to the longitudinal axis thereof as the drive shaft is rotated.