You will achieve ultimate yields all year 'round with this Plantmax Dual Arc Hybrid lamp. It contains both a 400 watt metal halide arc tube and a 600 watt high pressure sodium arc tube within the same lamp, enabling growers to reap the benefits of both lighting technologies. This lamp offers the ability to grow plants from vegetative stage (blue spectrum) through the flowering stage (red spectrum) and results in maximum yields. This lamp requires a 1000 watt HPS ballast with a ANSI code of S52.
Note: Do not use this bulb on a dimmed setting.