This is what it says in Tn.'s book.
Sailing Vessels & Vessels Under Oars
A sailing vessel, under sail alone, shall exhibit the lights shown on figure 4, 5 or 6. A vessel under oars or a sailing vessel of less than 7 meters (22 ft. 10 in.) shall, if practicable, exhibit the lights prescribed in figure 4, 5 or 6. However, if she does not, she must have ready at hand an electric light or lighted lantern showing a white light as seen in figure 7 which must be exhibited in sufficient time to prevent collisions.
Anchored vessels must show the appropriate anchor lights.
I have a cheep (from Wally World) set of battery powered clamp on bow and stern lights that I clamp on to the bresthooks of my canoe.
Richard