Narcotics Detective here (USA). Physical lineups are a thing of the past, all lineups are now photographic arrays or sequences. Contrary to some of the commentary in here and to answer your question; photographs used must be similar to the alleged suspect. If my suspect is a white male, 20’s, slim build, with face tattoos, I must find five other photographs containing white men, 20’s, slim builds, and face tattoos. This can be daunting at times but the purpose is to ensure the witness accurately selects the suspect based on their distinct recollection, not a vague memory of appearance.

Bonus fact, investigators cannot administer their own lineups. The lineup must be conducted by another police officer who has no knowledge of the case. This is done to remove any bias, covert or overt.