SPECIALITY LIGHTING (UV - A, B, C)

Disinfection Lamps

Optical radiation in UVC range is widely used as a disinfectant for water, air or surfaces. The effectiveness of killing viruses, bacteria, yeasts and fungi is greatly dependent on the wavelength of the UVC radiation. As applications of UV LEDs in purification systems increase, it is important to know that the effectiveness of disinfection strongly depends on both the LED bin used and batch to batch variation. UVC irradiance deactivation of harmful microorganisms varies based on wavelength shifts (not a case for mercury-based lamps which are consistent with peak wavelength). In order to guarantee healthy water checks of spectral LED characterization of every single LED, the completed application is critical.

How to measure:
To maintain continuous characterization of the disinfectant process we recommend spectral irradiance measurements in the UV range with the use of the optical spectroradiometer – GL Spectis 4.0 UV VIS NIR. This instrument can be calibrated from 200nm to 850nm with optical resolution (FWHM) of 2.5-3.5nm. For UVC spatial intensity distribution measurement the GL Spectis 5.0 Touch, in combination with the benchtop GL Gonio Spectrometer system, can be used. This system will provide a perfect solution to manufacturing issues caused by variable UVC intensity distribution. For radiant power measurements we recommend small sized integrating spheres GL Opti Sphere 48 or  GL Opti Sphere 205 which can be mounted directly, alternatively it can be coupled with one of the spectroradiometers by a fiber optic cable.

Pest Control Lamps

Attracting insects with UVA radiation by utilizing fluorescent or LED based lamps installed in insect traps is a widely used common practice. Catch rate strongly depends on the wavelength and intensity distribution of the lamps. Therefore, it is critical to maintain the correct LED wavelength properly. Shifts in peak wavelengths, even within the same LED bins, can reduce catch rate by half.

How to measure:
UV VIS Spectroradiometer GL Spectis Touch 1.0, calibrated from 340nm ( 320 on request ), can measure irradiance [mW/m2] and the spectral power distribution of the system. For single LED characterization, the GL Opti Sphere 48 mounted directly on the GL Spectis Touch 1.0 is an ideal solution. When traditional discharge lamps are replaced with UV LED modules, a spatial intensity distribution of UVA flux coming from the trap should be verified to ensure proper distribution of the radiation. This can be characterized with the use of our bench top GL Gonio Spectrometer GLG 4-500 connected with our GL Spectis 5.0 UV VIS spectroradiometer. Such setup will provide full spectral characterization of the source and collect radiant intensity distribution data. The data is available as a spatial distribution diagram in radiometric scaling [mW]

Medical Treatment Lamps

Narrow or wide beam UVB (280-315nm) and UVA (315-400nm) radiation is effectively used for treatment of skin diseases (e.g. psoriasis, vitiligo, atopic dermatitis). A small shift in the dominant wavelength, of just a few nanometers, can make the difference between the useful and the harmful effect of the radiation used for phototherapy. Consequently, it requires very high precision of wavelength or emission range measurements . Evaluating and releasing equipment for phototherapy can be done properly only with accurate and precise measurements of spectral power distribution and characterization of effective UVB/UVA irradiance.

How to measure:
Testing solution can be realized with the use of GL Spectis 4.0 UV VIS NIR or  GL Spectis 5.0 touch that can be/are available calibrated in required UVB and UVA range. Different fiber optic connections and probes are on demand depending on the application. A range of Opti Spheres designed to measure optical power is available with the possibility of their customization for different sizes of the tested products.