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4 It is important to inform the owner/client and project team that there may be times only one product will work in a specific application and that multiple names may not be possible for that product.


D PERFORMANCE CRITERIA SPECIFICATION. PURPOSE: Special requirements for many government and some private sector projects dictate the use of a performance criteria specification without the listing of manufacturers or specific catalog numbers. The performance specification attempts to identify, as completely as possible, both the quantifiable and qualitative aspects of a luminaire’s performance. Any product submitted for consideration must meet or exceed the performance characteristics set forth in this specification. Note: In many cases, performance specifications generate the most wide competition and thus best pricing.


1 Clearly identify all aspects of luminaire performance that are important to the situation in which the product is applied.


2 Whenever possible, provide quantifiable performance measures in the specification so that the potential for interpretive disagreements are minimized.


3 If non-quantifiable, qualitative aspects of a luminaire performance are critical (style, craftsmanship, etc.), provide examples of similar products or applications that can be cited later for comparison.


4 Insist that the “burden of proof” with regard to a submitted product’s ability to meet a performance criteria specification be placed solely on the submitting entity. The guidelines for submission are especially critical in a performance criteria specification.


Note: It is not unusual to request specific, highly developed calculations from vendors/manufacturers as a requirement for product submittal under a performance specification. This will not only help assure compliance with the design intent, but will discourage submission of “less-than-serious” product contenders.


E CUSTOM FIXTURE SPECIFICATION. PURPOSE: When an original luminaire design is developed to fulfill a specific application on a project.


1 Custom designs should always make reference that the manufacturer is required to fabricate according to all applicable codes (e.g., UL, CUL, DIN, wet location and/or any other labels) which may be required in the jurisdiction in which the project is located.


2 Provide sufficient details within the construction documents to permit the contractor to reasonably assess requirements for assembly and installation.


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