City Lights Antique Lighting is having a Store Closing Sale
Looks like the sale will go on until mid-January, as the signs tell people who are buying fixtures that they can't take them away until then.
City Lights is at 2226 Mass. Ave. in North Cambridge, across from Pemberton Farms.
ETA: Long article in Cambridge Day about the store, the closing, and the owner's continuing interest in Steampunk