Table 1.
Calculated exposure times (minutes) to deliver 3 doses selected because of their antimicrobial and mammalian-cell–sparing properties.
| Distance (cm) | Measured irradiance (mW) | 36 J/cm2 | 45 J/cm2 | 54 J/cm2 |
| 3 | 31.5 | 13.3 | 16.7 | 20.0 |
| 5 | 18.5 | 23.1 | 28.9 | 34.6 |
| 6 | 13.0 | 32.4 | 40.5 | 48.6 |
The calculated times are shown based on data transformed to mW/cm2. The R2 value of the linear regression of calculated irradiance (mW/cm2) compared with 1/r2 is 0.98 in agreement with the inverse-squares law. Power regression of irradiance compared with distance yielded an R2 value of 0.996.