 Why did Morgan turn on the lights at Infield & Morgan when Reggie entered?
Henry Infield placed the insulated circlet on his head gently. Infield stepped into the main stream of human traffic and tried to adjust to the second change in the air. A young man with black glasses and a radar headset (a photophobe) was unable to keep from being pushed against Infield. A clean-cut young man with mouse-colored hair was moving toward the stubble-chinned, heavy-shouldered man quivering in the center of a web of impervium cables stuck secure to the walls and windows of buildings facing the street, the sidewalk, a mailbox, the lamp post and Infield. The magnetic suction dart dropped away from Infield like a thing that had been alive and now was killed.
 Because he was sensitive to sound, Morgan's Cure was wearing ear protection. So he had to turn on the lights in order to read Reggie's lips.
 The room was too dark, and he wanted to see who had entered his business so suddenly in the middle of a bad storm.  He wanted to surprise Reggie with his presence so that he could dismantle Reggie's Cure easier.  Because he was sensitive to sound, Morgan's Cure was wearing ear protection. So he had to turn on the lights in order to read Reggie's lips.  In his shock at the news of Infield's death, Morgan turned on the light so that he could see Reggie and make sure he was telling him the truth.