Rationale

The proposed revision is based on a previous affirmative comment about the use of the International System of Units (SI) for illumination. The current standard refers to footcandles, a non-SI unit. The revision applies a conversion factor and rounds off with significant figures. This change aligns the standard with the ASTM Form and Style, Part H- Use of SI Units in ASTM Standards, and Annex A- SI Quick Reference Guide.