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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