title: Photobiological safety evaluation of UV nail lamps.
abstract: We evaluated six UV nail lamps representative of major US manufacturers to evaluate radiant hazards as defined in ANSI/IESNA RP-27 Recommended Practice for Photobiological Safety. Lamps were evaluated at three positions, 1 cm above the inner surface approximating exposure to the hand and the 20 cm RP-27 non-general light source distance, oriented normal and 45° to the opening. Hazard to skin at intended use distance classified these devices into Risk Group 1 or 2 (Low to Moderate) with S(λ) weighted Actinic UV ranging 1.2-1.7 μW cm(-2) and 29.8-276.25 min permissible daily exposure. At 20 cm on center and 45° UV risk to skin and eyes were all within Exempt classification. Actinic UV ranged 0.001-0.078 μW cm(-2) and unweighted near UV (320-400 nm) ranged 0.001-0.483 mW cm(-2). Likewise the retinal photochemical blue light hazard and retinal thermal and cornea/lens IR were also Exempt. One device had aphakic eye hazard slightly rising into Risk Group 1 (Low). There were no other photobiological risks to normal individuals. Total exposure following programmed times and steps accumulate to only a small fraction of RP-27 permissible daily occupational exposure. These risks are further mitigated in realistic nonoccupational use scenarios as it is unlikely to be a daily occurrence.
authors.affiliation: Rapid Precision Testing Laboratories, Cordova, TN, USA. rptldowdy@aol.com
authors.forename: John C
authors.initials: JC
authors.lastname: Dowdy
authors.forename: Robert M
authors.initials: RM
authors.lastname: Sayre
mesh_terms: D001505:Beauty Culture; D005128:Eye Diseases / Q000209:etiology*; D006801:Humans; D008029:Lighting / Q000295:instrumentation*; D009262:Nails / Q000528:radiation effects*; D011829:Radiation Dosage; D018570:Risk Assessment; D012307:Risk Factors; D012878:Skin Neoplasms / Q000209:etiology; D014466:Ultraviolet Rays / Q000009:adverse effects*