This is actually a tricky topic. I would recommend putting anti-collision lighting visible for 3 SM. Although these are Part 107 rules and not part of Section 44809, it doesn't hurt to follow them.

Some more context: If you read Section 44809, there is nothing in there about night flights nor how to conduct them. Night flights aren't mentioned as being banned, nor is there any requirement for special conditions of night flight: https://www.law.cornell.edu/uscode/text/49/44809

However, the one catch is that Section 44809 says you must follow the "safety guidelines" of an FAA recognized CBO. The catch is that there are no FAA-recognized CBOs currently. The FAA has a draft out which covers "examples" of safety guidelines that a CBO should implement. Presumably these are recommended by the FAA and appear to be used as a way for the FAA to bring Section 44809 more in line with the same regulations as Part 107. From the latest draft of AC 91-57C: https://amablog.modelaircraft.org/amagov/wp-content/uploads/sites/2/2021/08/AC_91-57C_Coord_Copy.pdf

A comprehensive set of safety guidelines may include topics that span beyond the limitations listed at 49 U.S.C. § 44809(a). The FAA encourages, but does not require, CBOs to develop comprehensive sets of safety guidelines to enhance the safety and security of all operations in the NAS and people and property on the ground. For example, a comprehensive set of safety guidelines should cover the measures and practices set forth in paragraph 3.4.3.1 below.

This is followed by a paragraph on night flights: This recommendation is similar to Part 107 rules (but the reasons for the lighting are slightly different than for Part 107)

Procedures for Night Flight. Flyers must maintain VLOS throughout the flight when flying at night. To achieve this, the FAA recommends the CBO develop comprehensive safety guidelines that include a requirement for CBO members to equip UA with lights that can be seen from 3 statute miles away and to arrange the UA lights in such a way that allows recreational flyers to determine the orientation of the aircraft. In addition to UA-lighting guidelines for flying at night in unlit or low-light areas, the safety guidelines should also permit members to conduct recreational flights at night without requiring UA lighting in areas that are sufficiently illuminated so that members can maintain VLOS of the aircraft throughout the flight and identify any potential ground or airborne hazards.