It looks like HV had the right call on this one according to the UL White Book.
Luminaire Poles (IEUR)
USE
This category covers poles for support of luminaires in accordance with Article 410 of the National Electrical Code. Included are poles that exceed 12 feet in length - measured from the bottom of the base, or from the intended grade level of poles for installation partially in ground. The poles are investigated with respect to suitability of the enclosure for supply conductors, provision of equipment grounding and bonding means, and a means of access to wiring.
Poles Classified under this category have not been evaluated for mechanical strength or wind loading.
Poles are evaluated for use in wet locations.
PRODUCT MARKING
Poles that are greater than 25 feet in length and not provided with conductor support are marked "FOR USE ONLY WITH A LUMINAIRE WITH INTEGRAL CONDUCTOR SUPPORT."
RELATED PRODUCTS
Poles that do not exceed 12 feet in length are Listed under Luminaire Fittings (IFFX).
Luminaire Fittings (IFFX)
Luminaire fittings are incomplete parts and/or subassemblies of luminaires intended for final assembly into luminaires in the field. Completely assembled luminaires incorporating luminaire fittings may be submitted to the Laboratories as part of the Factory Inspection and Follow-Up Service Program for Fluorescent, Incandescent and High Intensity Discharge Luminaires and, if found suitable, Listed as luminaires. Smoothness and thickness of wireways, methods for connection to a recognized wiring system, suitability of splice enclosure and means for inspecting splices are typical considerations given to the completed luminaire which cannot be judged until the fittings are assembled into a complete luminaire.
To sum up it looks like a pole 12ft or less is considered as part of the Fixture and over 12ft is support for a fixture.
Bill