An adaptor band is flexible, C-shaped, and includes a torsion spring receiver. Additionally, the adaptor band includes one or more slots for receiving a screw to fasten the adaptor band to an internal surface of a pre-existing light housing. The adaptor band is compressed and inserted within the pre-existing housing that does not have torsion spring receivers already therein. Once inserted, the adaptor band is released, thereby expanding and pushing against the internal surface of the housing. The adaptor band is fastened to the internal surface of the housing without having to hold the adaptor band in a fixed position. The torsion spring receivers receive torsion springs coupled to other lighting components, including light modules and trim modules.