L4mps (Lamps) is a five-member unit of the HAMA Tours night squad in "18TRIP," a travel story set in Yokohama in the near future. The members are: the leader Nagi Hachinoya (born on July 22, HAMA 16th ward), twin brothers Sugoromo Shiramitsu (born on June 12, HAMA 15th ward) and Ryui Shiramitsu (born on June 12, HAMA 15th ward), bar master Yataka Natsume (born on December 6, HAMA 17th ward), and cafe owner Yohaniko Ta (born on February 9, the head of HAMA18), who is the owner of the café. All members are store owners in HAMA, and together with Petrobot, they are in charge of hospitality during the evening hours. The unit color is purple. Their musicality is characterized by a combination of ennui, mysterious inclusiveness, and a unique spirit of surprise, which makes them a perfect choice for an adult night out On February 23, 2026, they released the single "18TRIP: Dance in the Night". This work is a dance number reminiscent of the streets at night, where silence and passion mingle, and is a superb pop tune that deeply intoxicates the listener.