A few weeks ago, I searched the interwebs for a halogen light bulb, even going so far as to click on a vendor and check out the prices and availability.
Fast forward to the present. When I open various pages on my browser, pop-up and sidebar ads for architects' lamps abound. Now, one realizes that we are monitored, and that advertisers impinge themselves upon us at every click, but does it not seem reasonable to believe that were I going to purchase any such item I would have done so, well, weeks ago?
There may be a built-in expiration date, though. About a year ago, I searched for a mother board for a flat screen TV set which was malfunctioning. The ads for TV sets finally petered out some months later. We'll see what happens with the lamps.