How can I turn a floor lamp, that emits light upward, into a reading light?
I would fit a disk of aluminum foil on top, either over or under the shade nut (the nut securing the shade frame to the lamp stud) and resting on the shade support arms. You could also use sheet metal, such as from the bottom of a coffee can.
This disk should not extend all the way out to the shade wall--leave at least 1/2&quot; for ventilation to prevent dangerous heat buildup. Do not use tape or other combustible materials. If you put the disk under the shade nut you could also use a standard or fender washer to prevent damage to the foil.
I'd also use an LED bulb, which emits much less heat than an incandescent bulb.