Xiamen Longstar Lighting Co., Ltd.
Company overview. Xiamen Longstar Lighting Co., Ltd. (Chinese: 厦门龙胜达照明电器有限公司; short name "Longstar Lighting") is a privately held, foreign-invested (Singapore-owned per Chinese business registry data) manufacturer headquartered in Xiang'an District, Xiamen, Fujian Province, China. It was established in 2002, with registered capital of roughly US$5.7 million. Public sources give varying size figures: company profiles cite 1,000–3,500+ employees and annual revenue reported anywhere from ~RMB 300 million (Baidu Baike) to ~RMB 1.2 billion (Xiamen municipal employment records); none are audited, so treat as approximate.
Products / operations. Longstar is an operating lighting manufacturer that began making compact fluorescent lamps and now produces LED lighting, including A-shape SMD LED bulbs, LED filament bulbs, candle/globe bulbs, downlights, MR16 and PAR series bulbs, LED tubes, and residential fixtures (recessed downlights, shop lights, ceiling/vanity fixtures, outdoor lighting). It also offers OEM/ODM design-to-manufacturing services, holds its own brands (LONGSTAR, 亮世家/Liangshijia, among others), and holds ~30–40 patents of its own. Products carry UL, CE, Energy Star, FCC, and related certifications and export mainly to North America, Europe, Australia, and Japan.
Patent-litigation posture. Longstar is an operating company engaged in active, two-way litigation with competitor Feit Electric — not an NPE. It appears once as a defendant (Feit Electric Company, Inc. v. Elong International USA, Inc. et al., N.D. Tex., Dallas Division, filed May 2024), where Feit accused LED filament bulbs imported by Longstar's U.S. affiliate Elong International and sold under Lowe's "Utilitech" and Walmart "Better Homes & Gardens" labels of infringing U.S. Patent No. 8,604,678. Longstar also appears once as petitioner (listed as "plaintiff") in the PTAB proceeding Savant Technologies LLC et al. v. Feit Electric Company, Inc., where it joined Savant/GE Lighting, LEDVANCE, and Elong in inter partes review challenging the same patent.
Notable context. The PTAB instituted IPR2024-01357 in March 2025, and Longstar/Elong's later joinder petition (IPR2025-00258) was denied in a decision the USPTO designated precedential in January 2026. The parallel Texas district case was jointly dismissed without prejudice in January 2026, leaving Feit free to reassert. The dispute centers on LED filament "wavelength conversion" technology — a core product category for Longstar.