Lynx-Diamant 1013D/240 adaptor for 10 Watt and 13 Watt two-pin square-based lamps. This incorporates an internal magnetic ballast arranged in a "Toroidal" design; that is, to say that the windings are arranged in a ring-shaped core.

The adaptor features a G24D-1 lampholder.

The width of the adaptor becomes apparent when a lamp is fitted.