Here is a visual intersection of all four items! These iconic “Nessino” or “Nesso” style table lamps designed by Artemide are famously shaped like oversized capsule pills.
If you are looking for a comb, nail care tools, and a lamp working together in a different context, a manicure setup combines a UV/LED lamp for curing gel polish, nail files/bits, and sometimes grooming accessories like a fine-toothed comb or brush used in nail art dusting:
Were you thinking of a specific brain teaser, riddle, or hidden object puzzle with these four words?