A photovoltaic power plant includes solar cells and inverters that convert direct current generated by the solar cells to alternating current. The light unit includes: a holder with a front end and a back end; at least one lens located within the holder at the front end of the holder; and at least one light source located within the holder and axially spaced from the at least one lens such that light produced by the light source projects along the holder, through the lens, and out the front end of the holder. In some aspect, the data include key-pair-validation values that can be used to validate the public and private keys for each implicit certificate. A pad would be attached to the sticky side of each embodiment closer to the first end of the bandage than the second end of the bandage. At runtime, the sub-routine utilizes a configuration service to retrieve a map of current configuration data from memory, based on values of the variable. One example such systemdevice is modular and includes a rack support and bin-like units for retaining and providing easy identification and access to coiled tubing, such as coiled copper tubing of differing diameters.