Nepenthes Premature Pitcher Opening and No Regrowth After Cutting: Light, Water, and Species ID

A grower reports pitchers opening before fully growing, and cut pitchers not regrowing. The expert (Dan) requests details: lighting, watering, soil, temperature, species. Follow-up reveals tap/filtered water, "cultivatable soil," 18–30°C, indirect sun/artificial light. The expert identifies tap water minerals and insufficient light as likely causes. Recommends distilled water, added fluorescent grow lights (2–6 hrs extra), and notes the plant appears to be a highlander needing more light.