Relative spectral energy distribution of UVB-313 fluorescent lamp in UV aging test chamber

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The UVB-313 fluorescent lamp is commonly used in UV aging test chambers to simulate the effects of sunlight on materials. This lamp has a specific relative spectral energy distribution that meets industry standards. It emits radiation primarily in the ultraviolet range, with less than 10% of its total output below 300 nm. The peak radiant energy occurs at 313 nm, making it particularly effective for testing material degradation caused by UV exposure. Below is the relative spectral energy distribution of the UVB-313 fluorescent lamp within the UV aging test chamber: | Wavelength Passband (nm) | Minimum (%) | Maximum (%) | |--------------------------|-------------|-------------| | λ < 290 | 1.3 | 5.4 | | 290 ≤ λ ≤ 320 | 47.8 | 65.9 | | 320 < λ ≤ 360 | 26.9 | 43.9 | | 360 < λ ≤ 400 | 1.7 | 7.2 | Note: The values in the table represent the cumulative irradiance within each wavelength passband as a percentage of the total irradiance between 250 nm and 400 nm. This data helps ensure accurate simulation of natural UV conditions during accelerated aging tests. This lamp is widely used in industries such as automotive, coatings, and plastics to evaluate the long-term durability of materials under UV exposure. Understanding the spectral characteristics of the UVB-313 lamp is essential for conducting reliable and repeatable aging tests.

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