Elinchrom Flashtube - 4000W/S - for S4000, T4 Heads. One of the standout features of the Elinchrom Flashtube Quartz STD 4000 is its durability and longevity. Crafted from high-quality materials, this flashtube is built to withstand the rigors of frequent use in a studio environment. Its quartz construction ensures not only excellent light quality but also a prolonged lifespan, allowing photographers to rely on it for countless shoots. Compatible with Generator 404. Typical CCT is 5600K +-200K