Lamp Holders are handy for mounting an extension lamp onto the side of the loom. They are designed for the Standard Low Castle Floor Loom and can be installed on one or both sides of the loom. The High Castle Standard Floor Loom already has holes drilled on the top castle to accommodate a lamp.
You can also mount a Lamp Holder on a Mighty Wolf Loom, but you need to request shorter screws when ordering it.
On the Baby Wolf, a Lamp Holder mounted on the side castle will restrict the folding ability of the loom. However, the Baby Wolf High Castle Tray has holes in the top for the post of an extension lamp, so a lamp holder isn’t needed when using a high castle tray.