The following illumination provisions shall be applicable to all future condominium and conversion condominium developments within the City and existing development within six months of the effective date of this section.
(a) Definitions. The following definitions shall be applicable to this section.
(1) "One footcandle" means the amount of illumination provided by one lumen uniformly distributed on one square foot of surface.
(2) "Illumination source" means a device, such as a lamp, which produces visible energy as distinguished from devices or bodies which reflect or transmit light such as a luminaire.
(3) "Lumen" means the quantity of luminous flux intercepted by a surface of one square foot, all points of which are one foot from a uniform source of one candela. A one candela source provides 12.57 lumens or one lumen per square foot of surface on a sphere having a radius of one foot.
(4) Metering equipment. Illumination levels shall be measured in foot-candles with a direct reading portable light meter with a color and cosine corrected sensor with multiple scales. The meter shall read with an accuracy of fifteen percent (15%) . It shall have been tested and calibrated by an independent commercial photometric laboratory or the manufacturer within one year of date of use as attested to by certificate issued by such laboratory.
(5) Method of measurement. The meter sensor shall be mounted not more than six inches above finished grade in a horizontal position. Reading shall be taken by qualified personnel only after the cell has been exposed long enough to provide a constant reading. Measurements shall be made at least one-half hour after sunset upon the existing questioned light sources.
(6) "Exterior walkways" means the paved pedestrian areas, including steps, defined by the building owner, and approved by the Building Department, as the primary paths used by occupants for access to the building.
(7) "Exterior steps" means steps consisting of one or more risers that are part of the exterior walkways.
(8) "Entrances" means all means of access to the main building by occupants and/or visitors.
(9) "Parking lots" means all exterior areas where owners, tenants or visitors normally park vehicles.
(10) "Parking garage" means a building or portion of a building designed for and used for the temporary storage of passenger automobiles, and/or recreational vehicles.
(b) Exterior Walkways. All exterior walkways in excess of twenty feet in length shall be illuminated from one-half hour after sunset to one-half hour before sunrise to an illumination level measured at any point along the walkway of not less than two-tenths footcandle maintained.
(c) Exterior Steps. All exterior steps that are part of the exterior walkways more than twenty feet from the pedestrian entrance to the building shall be illuminated from one-half hour after sunset to one-half hour before sunrise to a level at least double that of the illumination level measured ten feet in either direction along the walkway adjacent to the steps. The illumination level at the steps must be minimum of four-tenths footcandle maintained.
(d) Entrances. All entrances to each building shall be illuminated from one-half hour after sunset to one-half hour before sunrise with an illumination source located within five feet of the doorway of not less than two footcandles maintained immediately below the illumination source six inches above finished grade with a minimum of one footcandle maintained measured at the horizontal surface immediately in front of the center of the doorway.
(e) Parking Lots. All outside parking areas shall be illuminated from one-half hour after sunset to one-half hour before sunrise to an illumination level measured at any point in the paved area of the parking lot or driveways, when unobstructed, of not less than two-tenths footcandle maintained.
(f) Parking Garages. All parking shall be illuminated at all times to a level measured anywhere in the unobstructed parking area of not less than six-tenths footcandle maintained, and measured anywhere along aisleways for movement of vehicles, of not less than two footcandles maintained.
All illumination requirements contained herein shall be designed and shielded so as not to shine, glare, reflect or be directed into or towards any premises used for residential purposes.
All illumination requirements contained herein are the minimum and shall be maintained at all times as indicated.
(Ord. 5985-1981. Passed 6-8-81.)