TABLE III

Visual Inspection Environments

Test SiteSite 1Site 2Site 3
Trial 1Trial 2
Lightingone 22-inch Sylvania Cool white fluorescent bulb 18 watttwo 16-inch GE F15T8-CW Cool white fluorescent bulbs 15 wattone 8-inch Phillips FC8T9/DX Fluorescent ring bulb 22 wattone 3-inch SLI Lighting Halogen linear bulb 100 watt
Lighting position10 inches above sample10 inches above sample20 inches above sample10 inches above sample
Background colorWhite matteWhite matteWhite matteWhite matte
Background positionVerticalHorizontalVerticalVertical and horizontal
Sample distance from inspectorComfortable arms' lengthComfortable arms' lengthComfortable arms' lengthComfortable arms' length
Comparison to known, no dye controlYesYesYesYes