These 60-watt UV sterilization lamp fixtures do not have our filter glass installed - these are clear glass lamps. They emit powerful UltraViolet UV-C light. Please scroll down to the section "How to Use a Dose Table" for more information.
These lamp fixtures are available only in AC versions and the ballasts are universal input which automatically selects between 110-115 volts or 220-240 volts. The ballasts feature a programmed start cycle that will energize tubes/bulbs/lamps for an average of 50-60,000 on/off cycles before burning out the tube/bulb/lamp. The tubes/bulbs/lamps have 4 pin 2G11 bases.
There were customers who tried to operate the lamp fixtures without turning on the fan because the fan noise annoyed them. This caused the ballasts to turn off because of their high temperature protection and to turn back on when the ballasts cooled off. Eventually, the ballasts stopped working and the lamp fixture was returned for warranty repair. The WTC solution was to change the wiring schema so that the same switch that powers the fan also sends power to the other switches. The result is that the tubes/bulbs/lamps cannot be turned on unless the fan is already on.
The ability of Ultraviolet light to kill microorganisms depends on multiple factors, including (but not limited to): the intensity of the UV source, the distance from the source to the microorganism, the exposure time, and the type of microorganism. Based on the UV output of this lamp listed above, you can refer to the following dose tables for an idea of exposure times for various microorganisms.
https://www.americanairandwater.com/uv-facts/uv-dosage.htm
LennTech: Disinfection by Ultraviolet Light
ClorDiSys: Ultraviolet Light Disinfection Data Sheet