Description Runs from a Regular Ballast The Pro 600w CMH lamp is the first lamp of its kind that doesn’t require a specialized ballast.This means that you can take advantage of CMH lighting without having to upgrade your other hardware! A great entry point into CMH lighting – just replace your old HPS lamp with this one Compatible with old-school ballasts A highly cost-effective solution Fits typical reflectors (with E40 socket) Tuned for flowering, but delivers amazing results in both veg and flower Produces full-spectrum light that mimics natural sunlight Great as a standalone light or as supplementary lighting