NZBC Clause B2 specifies durability requirements of building elements.
Products which conform to Clauses F6 and F8 are also required to meet Clause B2.3.1. This means that they must continue to meet the Building Code:
Given that normal use of the building does not involve occupants being in a lights-out condition, failure could go undetected during normal use of the building, so the products need to continue to meet F6 and F8 for 15 years.
Testing has shown that Ecoglo products will meet this requirement, therefore there is no need for ongoing luminance testing.