Wavelength - The nanometer (one billionth of a meter) is a unit of length used to describe ultraviolet wavelengths. Approximately 95% of the ultraviolet energy emitted from STER-L-RAY germicidal lamps is at the mercury resonance wavelength of 254 nanometers. This wavelength is in the region of maximum germicidal effectiveness and is highly lethal to virus, bacteria, protozoa and mold.

Ozone Producing Lamps - Ozone (O3) is a highly reactive form of oxygen and is useful in water purification, as a deodorizer and as a cleaning agent. Ultraviolet wavelengths shorter than 200 nanometers are capable of producing ozone from Oxygen (O2) in the air.

STER-L-RAY ozone lamps, in addition to emitting germicidal ultraviolet output at 254 nanometer wavelength, also emit ozone producing rays at 185 nanometer wavelength. Because it is necessary to avoid exposing personnel to high concentrations of ozone, the use of ozone lamps is limited to applications in which ozone concentration will not exceed .05 parts per million in occupied spaces.

STER-L-RAY ozone producing lamps are available in slimline, cold cathode, high output, high intensity, enhanced output and preheat types.

Slimline Germicidal Ultraviolet Lamps*

STER-L-RAY Slimline germicidal lamps are instant starting and utilize a coil filament on each end which operates hot. Lamp life is governed by the life of the electrodes and is affected by the frequency of starting.

STER-L-RAY Slimline germicidal lamps are well suited to applications requiring high ultraviolet intensity such as water sterilization, air purification in duct systems and conveyorized product disinfection. Available in ozone producing and non-ozone producing versions.
U-Shape Slimline Germicidal Ultraviolet Lamps*

STER-L-RAY U-shaped Slimline germicidal lamps are instant starting and utilize a coil filament on each end which operates hot. Lamp life is governed by the life of the electrodes and is affected by the frequency of starting.

STER-L-RAY U-shaped Slimline germicidal lamps are well suited to applications requiring high ultraviolet intensity such as water sterilization, air purification in duct systems and conveyorized product disinfection. Available in ozone producing and non-ozone producing versions, and are the ideal choice for applications that require more intense ultraviolet radiation in a limited space.
Cold Cathode Germicidal Ultraviolet Lamps*

STER-L-RAY Cold Cathode germicidal lamps are instant starting and utilize a large cylindrical cathode instead of a tungsten filament. Due to this construction, the lamp is not adversely affected by frequent starting and the life is considerably in excess of other lamp types. STER-L-RAY Cold Cathode germicidal lamps have favorable operating characteristics at reduced temperatures. They are, therefore, widely used in walk-in refrigerators and holding rooms.

STER-L-RAY Cold Cathode germicidal lamps are well suited to disinfection of air and surfaces of unoccupied areas due to their long life and low depreciation. Cold cathode germicidal lamps are also employed in applications where frequent starting is a requirement. Available in ozone producing and non-ozone producing versions.
U-Shape Cold Cathode Germicidal Ultraviolet Lamps*

STER-L-RAY U-Shape Cold Cathode germicidal lamps are instant starting and utilize a large cylindrical cathode instead of a tungsten filament. Due to this construction, the lamp is not adversely affected by frequent starting and the life is considerably in excess of other lamp types. STER-L-RAY U-Shape Cold Cathode germicidal lamps have favorable operating characteristics at reduced temperatures. They are, therefore, widely used in walk-in refrigerators and holding rooms.

STER-L-RAY U-Shape Cold Cathode germicidal lamps are well suited to disinfection of air and surfaces of unoccupied areas due to their long life and low depreciation. Cold Cathode germicidal lamps are also employed in applications where frequent starting is a requirement. Available in ozone producing and non-ozone producing versions, and are the ideal choice for applications that require more intense ultraviolet radiation in a limited space.
Preheat Germicidal Ultraviolet Lamps*

STER-L-RAY Preheat germicidal lamps are operated by a preheat start circuit that employs a relatively compact and economical ballast. The preheat circuit requires four electrical connections per lamp and a slight to moderate delay is needed to start the lamp. Some modern electronic ballasts are capable of instant starting a preheat lamp. Available in ozone producing and non-ozone producing versions.
High Intensity Germicidal Ultraviolet Lamp*

STER-L-RAY High Intensity germicidal lamps are manufactured with a unique structure and large diameter quartz envelope which translates to more than twice the amount of ultraviolet output when compared to standard germicidal lamps of the same length. Custom designed lengths can also be supplied. Available in ozone producing and non-ozone producing versions.
High Output Germicidal Ultraviolet Lamps*

STER-L-RAY High Output (HO) germicidal lamps are similar in size and shape to conventional germicidal lamps but are capable of operating at higher input power and current. Atlantic Ultraviolet's Surelite ballasts have been extensively tested with STER-L-RAY High Output (HO) lamps and are strongly recommended to achieve the best performance and longest lamp life. STER-L-RAY High Output germicidal lamps are widely used in forced air duct systems and water disinfections applications. HO ozone producing lamps are often found in odor control and photochemical applications.
Enhanced Output (Amalgam) Germicidal Ultraviolet Lamps*

STER-L-RAY Enhanced Output (Amalgam) lamps provide germicidal ultraviolet output three or more times that of conventional germicidal lamps of similar length without sacrificing efficiency or lamp life. STER-L-RAY Enhanced Output (Amalgam) lamps are the highest expression of ultraviolet lamp technology and as such are the subject of ongoing technical development and improvement. Custom and proprietary designs are available to satisfy specialized needs. A complete range of Surelite high efficiency electronic ballasts are available to provide superior and reliable performance of STER-L-RAY Enhanced Output ultraviolet lamps. Available in ozone producing and non-ozone producing versions.
Hot Cathode Soft Glass Germicidal Ultraviolet Lamps*

Hot Cathode Germicidal Ultraviolet Lamps produce short wave radiation in the range of 253.7nm (nanometers) that have an excellent germicidal effect. Ultraviolet germicidal lamps are similar to general fluorescent lamps but are manufactured with a special glass which efficiently transmits ultraviolet rays.

Hot Cathode lamps utilize tungsten filaments, located inside each end of the lamp, which are coated with emission material and, under normal operation, govern the life of the lamp. Frequent starting of the lamp reduces the overall lamp life. Lamp is also affected by extreme hot or cold temperatures. There are several different lamps with varying lengths and watts to choose from. Most of these lamps use a miniature bipin (G5) or medium bipin (G13) base. Lamps can be used in a variety of air, water and surface disinfection applications. Call and speak with one of our ultraviolet application specialists to determine the type of lamp best suited for your application.