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The characterization of a black light device: a hazard evaluation process.

O L Ellingson

    American Industrial Hygiene Association Journal
    |August 1, 1986
    PubMed
    Summary

    Black light devices can pose an occupational hazard due to excessive ultraviolet radiation (UVA and UVB) exposure, exceeding established guidelines. Modifications to the black light device design successfully reduced exposure to safe levels without affecting performance.

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    Area of Science:

    • Occupational Health and Safety
    • Photobiology
    • Industrial Hygiene

    Background:

    • Optical radiation sources, particularly broad-band sources like black light fluorescent lamps, present potential occupational hazards.
    • Assessing ultraviolet (UV) radiation exposure is critical for protecting worker health.
    • Existing occupational exposure guidelines, such as those from the American Conference of Governmental Industrial Hygienists (ACGIH), provide benchmarks for safe UV levels.

    Purpose of the Study:

    • To evaluate the occupational hazard of a black light fluorescent lamp device concerning ultraviolet radiation exposure.
    • To compare measured UV exposure levels against ACGIH occupational exposure guidelines.
    • To determine if design modifications can mitigate excessive UV exposure while maintaining device functionality.

    Main Methods:

    • An occupational hazard evaluation process was employed to measure ultraviolet radiation emitted by a black light fluorescent lamp device.
    • Measured exposure levels were compared to the ACGIH Threshold Limit Values (TLVs) for ultraviolet radiation (UVA and UVB).
    • Design modifications were implemented on the device, followed by re-evaluation of UV exposure levels.

    Main Results:

    • The black light fluorescent lamp device, in its original configuration, exceeded the ACGIH TLVs for both UVA and UVB radiation.
    • Post-modification, the device demonstrated acceptable occupational exposure levels for UVA and UVB.
    • The design changes did not negatively impact the performance or intended function of the black light device.

    Conclusions:

    • Black light fluorescent lamp devices can be a source of hazardous occupational ultraviolet radiation exposure.
    • Adherence to ACGIH guidelines is essential for ensuring worker safety around optical radiation sources.
    • Effective design modifications can successfully reduce UV exposure to safe occupational levels without compromising device utility.

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