Specifications

MH/HPS electronic ballast 400w Hydroponics
More 30% lumen output
no heat and extrem quite during working
3 years no hassle warranty

Powers both metal halide and high pressure sodium lamps.

The only units on the market to pass strenuous UL testing
Constructed from only the best components from USA, Japan and China
Compatible with major lamp brands and types 
Generator compatible
Universal reflector adaptor included
Internal surge protection
Protection of short circuit
Protection of open circuit
Protection of ignition failure