Abstract: A spectral analysis apparatus includes a light transmissive envelope, first and second electrodes, a sleeve, and first and second electrical contacts. The light transmissive envelope contains a fluid operable to emit light when electrically energized. The first electrode is disposed upon an external surface of an end portion of the envelope external to the envelope. The second electrode is disposed upon an external surface of a second end portion external to the envelope. The sleeve defines a cavity configured to removably receive the envelope. The electrical contacts are in communication with the cavity and are configured to electrically connect to the corresponding electrode when the envelope is within the sleeve. The electrical contacts are connectable to an electrical power supply and electrically energize the fluid when connected to the electrical power supply.

Abstract: A spectral analysis apparatus includes a light transmissive envelope, a first and second electrode, a sleeve, and a first and second electrical contact. The light transmissive envelope includes a first end portion and a second end portion and the envelope contains a fluid operable to emit light when electrically energized. The first electrode is disposed upon an external surface of the first end portion and is completely external to the envelope. The second electrode is disposed upon an external surface of the second end portion and is completely external to the envelope. The sleeve defines a cavity configured to removably receive the envelope. The first electrical contact is in communication with the cavity and is configured to electrically connect to the first electrode when the envelope is within the sleeve. The second electrical contact is in communication with the cavity and is configured to electrically connect to the second electrode when the envelope is within the sleeve.