Section 229-204-02 - DEFINITIONSFor the purpose of designing for installing, replacing or maintaining highway lighting, the following definitions will be used:
A. Lumen - A unit of measure of the quantity of light. One lumen is the amount of light that falls on an area of one square foot, every point of which is at a distance of one foot from a source of one candela.B. Footcandle - A unit of illumination when the unit length is one foot; one lumen distributed uniformly over an area of one square foot.C. Lux - The unit of illumination when the meter is the unit length; one lumen distributed uniformly over an area of one square meter.D. Horizontal footcandle - One lumen distributed uniformly over a horizontal surface one square foot in area.E. Vertical footcandle - One lumen distributed uniformly over a vertical surface of one square foot in area.F. Luminance - The luminous intensity of a surface in a given direction per unit of projected area of the surface as viewed from that direction.G. Footlambert - The unit of photometric brightness (luminance).H. Candela - The unit of luminous intensity.17-229 C.M.R. ch. 204, § 02