My springer does this too - someone thought it was funny to shine a torch along the floor, and watch her chase the light beam - it WAS funny, but it leads to an obsession - which is what you're perhaps experiencing now Honey-Bee? It got way too much for me when Jazz leaped on top of me to catch a sunbeam on the wall behind me, knocking my boiling hot coffee all over me.
We try to avoid allowing too much light into the room if possible i.e. close the blinds if it's too sunny. Torches are banned!
And most importantly, what worked for us was to substitute this obsession for something entirely more manageable - get out the old tennis ball, which grabs her attention immediately. At least this is one behaviour pattern we can control, if you know what I mean