Except as provided below, all outdoor light fixtures lawfully installed prior to and operable on the effective date of this chapter are exempt from the requirements of this chapter.
1. There shall be no change in use or lamp type, or any replacement (except for same-type and same-output lamp replacement) or structural alteration made, without conforming to all applicable requirements of this chapter. If more than 50 percent of the luminaires on a parcel of property are being replaced within a 12-month period of time, such replaced luminaires must comply with the provisions of this chapter, even if the replacements are of the same type and same output. Further, if the property is abandoned, or if there is a change in use of the property, the provisions of the chapter will apply when the abandonment ceases or the new use commences.
2. All lighting fixtures in zoning districts (other than residential) that are capable of being aimed must be aimed in a manner than complies with this chapter within one year of enactment of the outdoor lighting ordinance.
3. All lighting fixtures in zoning districts (other than residential) that can be converted to full cutoff fixtures by adding a shielding device manufactured by the original equipment manufacturer must do so within two years of enactment of the outdoor lighting ordinance.
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