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Table 1 Energy densities of 310 nm and 265 nm by irradiation with ultraviolet light-emitting-diode device. Power fluencies of tested devices were calculated by the following formula: Energy density (mJ/cm2) = Power density (mW/cm2) × Time (seconds)

From: Bactericidal effects of 310 nm ultraviolet light-emitting diode irradiation on oral bacteria

Time (sec) 10 30 60 120 180 240
310 nm 17.5 52.5 105 210 315 420
265 nm 17.1 51.3 102.6 205.2 307.8 410.8
  1. Energy density (mJ/cm2)