Light Sources and LightTech offer high-quality standard germicidal 254 nm UV lamps in both ozone free and ozone generating solutions. The type of fused quartz used to make the body of the germicidal lamp determines the emission of the wavelength in UV 254 nm energy. Light is broken into colors and measured by wavelength in nanometers with UV light in the range of 254nm proven to eliminate bacteria, viruses and harmful contaminants.  254nm UV light is highly effective in sterilization and purification applications used to disinfect air, water and surfaces.

“L” or “Low ozone” generating lamps transmit up to 90% of their energy at the 254nm wavelength and typically utilize a doped fused quartz that blocks the emission of 185nm energy. “VH” or “Very high ozone” generating lamps are produced using clear fused quartz which allows for the transmission of energy at both 185nm and 254nm wavelengths.

The 185nm energy reacts with the oxygen in the air to produce ozone. In applications that require moderate amounts of ozone, we custom splice the two types of quartz together to form a custom “L” to “VH” ratio according to the customer’s specific requirements.

254 nm UV Lamp and 185nm Ozone Generating Lamp

254 nm UV Lamps

L254 nm UV lampsightSources & LightTech’s low-pressure, mercury-arc germicidal 254 nm UV lamps are specially designed to produce the highest amounts of UV radiation – where 90% of the energy is typically generated at 254nm. This radiation is very close to the peak of the germicidal effectiveness curve of 265nm, the most lethal wavelength to microorganisms. UV 254 nm light is proven to destroy bacteria and viruses by altering the DNA of the cells harmful contaminants, even microorganisms naked to the human eye. (see graph).

Our 254nm germicidal lamps are used extensively in the air and water purification markets and have been utilized in applications such as food and beverage, medical, HVAC  (Heating, Ventilation and Air Conditioning), pharmaceutical, the semiconductor sterilization industries and many others. Our germicidal lamps are essential components in many municipal drinking water facilities, waste water and ground water remediation industries.

185 nm Ozone Generating Lamps

  • “VH” (or water standard quartz drawingVery High ozone producing lamps) generate energy at 185nm in addition to the 254nm wavelength.
  • The UV emission at 185nm produces abundant amounts of ozone in air. Ozone is an extremely active and effective oxidizer, destroying microorganisms as well as acting as a deodorizer.
  • A primary advantage of the ozone generated by our UV germicidal lamps is that it can be carried through the air into places not easily reachable by direct UV exposure.

Interested to learn more? Check our education section and find out the many advantages of UVC radiation.


Standard Output Quartz Germicidal Lamps

Preheat Start Lamps
Low Ozone		 TubeDiameter BF – BF ArcLength Power¹ Current Voltage¹ UV output¹@ 254nm
mm mm mm W mA V µW/cm² W
GPH212T5L 15 212 132 10 425 25 27 2.7
GPH287T5L 15 287 207 14 425 34 40 4
GPH303T5L 15 303 223 15 425 35 43 4.3
GPH357T5L 15 357 277 17 425 42 57 5.7
GPH436T5L 15 436 356 21 425 51 72 7.3
GPH793T5L 15 793 713 38 425 92 125 13.5
GPH843T5L 15 843 762 41 425 98 150 16
GPH1148T5L 15 1148 1067 55 425 135 180 22
GPH1554T5L 15 1554 1474 75 425 179 240 33
GPH1630T5L 15 1630 1550 79 425 189 252 34.5
Preheat Start Lamps
Ozone Generating		 TubeDiameter BF – BF ArcLength Power¹ Current Voltage¹ UV output¹@ 254nm
mm mm mm W mA V µW/cm² W
GPH212T5VH 15 212 132 10 425 25 27 2.7
GPH287T5VH 15 287 207 14 425 34 40 4
GPH303T5VH 15 303 223 15 425 35 43 4.3
GPH357T5VH 15 357 277 17 425 42 57 5.7
GPH436T5VH 15 436 356 21 425 51 72 7.3
GPH793T5VH 15 793 713 38 425 92 125 13.5
GPH843T5VH 15 843 762 41 425 98 150 16
GPH1148T5VH 15 1148 1067 55 425 135 180 22
GPH1554T5VH 15 1554 1474 75 425 179 240 33
GPH1630T5VH 15 1630 1550 79 425 189 252 34.5
Instant Start Lamps
Low Ozone		 TubeDiameter BF – BF ArcLength Power¹ Current Voltage¹ UV output¹@ 254nm
mm mm mm W mA V µW/cm² W
G10T5L 15 357 277 17 425 42 57 5.7
G24T5L 15 692 612 32 425 77 95 11
G36T5L 15 843 762 41 425 98 150 16
G48T5L 15 1148 1067 55 425 135 180 22
G64T5L 15 1554 1474 75 425 179 240 33
G67T5L 15 1630 1550 79 425 189 252 34.5
Instant Start Lamps
Ozone Generating		 TubeDiameter BF – BF ArcLength Power¹ Current Voltage¹ UV output¹@ 254nm
mm mm mm W mA V µW/cm² W
G10T5VH 15 357 277 17 425 42 57 5.7
G24T5VH 15 692 612 32 425 77 95 11
G36T5VH 15 843 762 41 425 98 150 16
G48T5VH 15 1148 1067 55 425 135 180 22
G64T5VH 15 1554 1474 75 425 179 240 33
G67T5VH 15 1630 1550 79 425 189 252 34.5

Note 1: Lamp data is based on measurements performed under laboratory conditions in air at room ambient temperature. Measurements were performed on a high-frequency, current limited electronic ballast and represent average values at 1 meter.

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