A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The new variety is a Vriesea, typically produced as an indoor ornamental plant. In some embodiments, the waste fluid channel and the main fluid channel are positioned and shaped such that differences in temperature between fluids disposed near opposite sides of the enclosure wall are substantially decreased or minimized at corresponding positions along the channels. Channel characteristics existing at the time of transmission of the known data segments are estimated by comparing the known data segments with the replica. Top surfaces of the light converging elements of the second light emitting unit row are disposed on a second surface.