LumePower S 400w Watt Digital HPS/MH Grow Light Dimmable Electronic Ballast THE LUMEPOWER BRAND - LumePower Digital Ballasts are the most economically priced ballast on the market. We offer you the EXACT same quality ballast as most any ballast you might buy at a retail hydro store for close to HALF the price, if not less. Why is our pricing so competitive you might ask? Because some ballasts for example are bought buy a branding company from a factory, sold to a distributor and then the distributor sells it to a store. It is then offered to you as a consumer for a price which has been marked up three times in the process. When purchasing from LumePower, you are buying form the source, not a multi-channel, tiered source with markups along the way. Our ballasts offer the latest technology and cutting edge designs in the industry. We do not market our ballast in a manner to sell you on fictions claims, custom enclosures and a bunch of needless fluff. A LumePower Ballast is a workhorse ballast. It is what it is, a switching, high frequency power supply which is engineered to light HPS and MH lamps with a very high power factor. LumePower Ballasts have proven reliability. Each ballast is tested and burned in at the factory while all the QC inspection parameters are met. This is why we can offer a THREE year warranty, while most others only offer 1-2 years. THE BALLAST - This is a fan model ballast. It is in a metal case similar to Nano styles on the market. The ballast has lamp starting logic and also sequential starting for staggered lighting of ballasts to lower power surges. Circuit breaker protection with auto timed refire technology. 4 wattage settings, two dimming at 75% and 50% and a 110% overdrive. Strikes both HPS and MH lamps. The ballasts are flip compatible. Its high operating frequency not only ensures continuous power delivery, high power factor and high luminous efficiency. It has a silent operation and light weight design. 100V-250V input. Dual industry plug connector for fitting most all lighting hood brands. Open & Short Circuit Protection, Ignition Failure Protection, Overheating Protection and End-of-Bulb-Life Protection. DE lamp compatible.