It is important to recognize identified is not limited to listed or labeled. See Section 500.8(A) Suitability and the definition of identified in Article 100.
I can see a bit of circular ambiguity in the 2008 NEC; however, the 2011 NEC reworded Section 501.130(B)(2) slightly. If you read it carefully, you will see that, in this particular context, a ?dusttight? enclosure is automatically identified for Class II, Division 2.
Of course, Section 410.6 still requires that the luminaire must be listed - just not specifically for Class II, Division 2. The remaining concern is that the fixture otherwise meets the temperature qualifications of Section 500.8(D)(2).