Lutemkrat is a black metal project from Curitiba, Paraná, Brazil, founded by the sole member Wolf Lutemkrat in 2002 and first releasing music in 2003 with the EP Never Surrender. The project draws heavily from the second wave of black metal and has built an extensive discography spanning multiple full-lengths including The Last Survivor (2007) and Circumscribed in a World of Senses (2016), with lyrical themes revolving around war, battle, honour, and philosophical darkness.

Luthien is an Argentine power metal band documented on Encyclopaedia Metallum with a discography that includes the albums Sombras del ayer and Sangre y Cenizas (2008, self-released, 11 tracks in Spanish). Sangre y Cenizas features songs such as "Ave Fénix," "Camposanto," and "La Mascarada," demonstrating the band's melodic heavy metal style with Spanish-language lyrics. The band takes its name from the Tolkien character Lúthien Tinúviel.

Luvart is a black metal band from Juiz de Fora, Minas Gerais, Brazil, originally active in 1993–1995 before reforming in 2009 and continuing to release material through the 2020s. Their 2023 album Until the Void, released by the French label Drakkar Productions, carries particular weight as it was completed amid the death of bassist Necromayhem during the recording sessions, making it a tribute to a fallen member and one of the band's darkest records.

Lux in Tenebris is a progressive heavy metal project from Resistencia, Chaco, Argentina, built around guitarist, bassist, and drummer Walter Erles (formerly of Armagedón), with vocalist Adso Maidana and keyboardist Alberto Méndez. Erles handles all recording, mixing, and mastering duties in-house; their catalog includes the self-titled debut (2014), Sangre Inocente (2017), and Cultus Paganus (2022). The band's seven-track third album Cultus Paganus, released June 2022, includes the epic ten-minute closer "Imperio de mil blasfemias."

Lux Inferium is a black metal project from Chavantes, São Paulo, Brazil, conceived by the musician known as Funestus and rooted in industrial black metal influences ranging from Limbonic Art and Mysticum to the Brazilian extreme metal tradition. The project's early recordings, including the Black Souls Procession demo (2006), later served as source material for Funestus's subsequent band Sadomystic, with re-recorded versions appearing on that group's later releases.

Luxúria de Lillith is a melodic black metal band from Goiânia, Goiás, Brazil, founded in 1998 by drummer and vocalist Alysson Drakkar, who remains the sole original member across a lineup that has included more than 25 musicians over the years. The band writes all lyrics in Brazilian Portuguese and explores themes of vampirism, Satanism, and occultism across a catalogue that includes A Volúpia Infernal (2005) and Géhènnòm (2019), the latter recognized as a significant work in Brazilian black metal and the subject of academic study at the Federal University of Goiás.

Luís Kalil is a Brazilian neoclassical heavy metal guitarist born in Bagé, Rio Grande do Sul, who relocated to Los Angeles to study at the Musicians Institute. He released his debut album Insight in 2015 at age 15, earning international recognition and becoming the first Brazilian guitarist to perform at EMGtv studios. His 2022 single Reverse Strike, featuring Megadeth drummer Dirk Verbeuren, showcased his signature reverse tapping technique and placed him among the prominent names in contemporary shred guitar.

Lybrian is a power/progressive metal band from São Paulo, Brazil, formed in 2023 by a five-piece lineup including vocalist/bassist Marc Maximo, guitarist/vocalist Lee Shade, guitarist David Thomazone, keyboardist Davi Miaty, and drummer John Oliver. The band released a string of singles in 2024, including "Eyes of Fairy" (February), "Voices of Valhalla" (March), and "Soul in Chains" (December), establishing an epic, melody-driven sound.

Lycanthrope is a black/heavy metal band from Melipilla, in Chile's Santiago Metropolitan Region, with occult themes running through their work. They released a rehearsal demo early in their existence and have been documented on the Encyclopaedia Metallum as part of the Chilean underground metal scene.