Ultraviolet Discharge Lamp Apparatuses Having Optical Filters Which Attenuate Visible Light

An apparatus, comprising:

• a germicidal lamp configured to emit ultraviolet light;
• a mobile carriage disposed beneath the germicidal lamp, wherein the mobile carriage comprises a casing having an uppermost surface at least 36 inches above the floor in which the apparatus is arranged, wherein a lowermost surface of the germicidal lamp is arranged at substantially the same level or above the uppermost surface of the casing, and wherein the apparatus is configured such that the germicidal lamp is not moveable beyond vertical planes aligned with the casing;
• and
• a reflector system arranged in the apparatus such that ultraviolet light emitted from the germicidal lamp is projected to a region exterior to the apparatus which is between approximately 2 feet and approximately 4 feet from a floor of a room in which the apparatus is arranged.

An apparatus, comprising:

• a germicidal lamp configured to emit ultraviolet light;
• a housing surrounding the germicidal lamp, wherein one or more sidewalls of the housing are transparent to ultraviolet light, wherein the germicidal lamp and the housing are arranged in the apparatus such that ultraviolet light emitted from the germicidal lamp and transmitted through the housing is projected exterior to the apparatus, and wherein the housing comprises a gas inlet and a gas outlet;
• a support structure supporting the germicidal lamp and the housing;
• an exhaust duct extending from the gas outlet of the housing into the support structure;
• and
• an exhaust outlet disposed along a sidewall of a lower half portion of the support structure or along a bottom surface of the support structure.

An apparatus, comprising:

• a pulsed germicidal lamp configured to emit ultraviolet light;
• and
• a sensor system to:
• monitor a pulse count of the pulsed germicidal lamp;
• and
• determine when to replace the pulsed germicidal lamp based on the monitored pulse count.