The OL's for each EAB (HB is not a category) aircraft will state something along the lines of:
(x) After completion of phase I flight testing, unless appropriately equipped for night and/or instrument flight in accordance with FAR 91.205, this aircraft is to be operated under VFR, day only.
While the wording has changed a bit over the years, this is the controlling paragraph, and indicates that for night and/or instrument flight, 91.205 compliance is required. Paragraph (C)(2) of 91.205 requires position lights, as you indicate, but paragraph (C)(3) requires anti-collision lights (which, in our case, is almost always strobes). There is nothing in the OL's or 91.205 that absolves EAB aircraft from this requirement, as it flows from the OL's to 91.205.
Maybe we're saying the same thing and I'm just misunderstanding you.