answer:If you have a lamp on your nightstand, a mirror would reflect the light harshly and glaringly. The light might be much brighter than you’d like it to be; for example, when you try to read in bed, the light could bounce into your eyes and be uncomfortable. Also, the underside of a lamp—the hardware and bulb, hidden by a lampshade—isn’t very attractive. You might not like the view in the mirror.