We claim the ornamental design for a frame for a lamp, as shown and described.
The subject matter of this application is related to U.S. design application Ser. No. 29/485,310, entitled a Desk Lamp, filed on even date herewith, and U.S. patent application Ser. No. 14/217,736, entitled a Rotating Lamp With Exchangeable Panels, filed on even date herewith, all incorporated herein by reference.
FIG. 1 is an orthogonal side view of a frame for a lamp of our new design;