The present invention is directed generally to lighting devices, and more particularly to white light LED-based lighting devices configured such that key subassemblies may be replaced, thereby enabling the modification andor repair of said device. The gas mixture does not contain oxygen, chlorine, bromine, iodine or halides in addition to the above mentioned constituents, so that the process can be carried out in reactor systems equipped with oxidizable electrodes. The server, in turn, maps the identifier to an action, such as returning metadata, re-directing the request to one or more other servers, requesting information from another server to identify the media object, etc. A duct extends from the pump upward through the tank and discharges water onto the outer surface of the tank from which the water flows into the bowl. Differential data is also transmitted to the external video interface. Different PE-VLAN IDs may be used as the Primary, Isolated and Community VLANs in different Islands.