Ballast GIB Lighting NXE 400 W, electronic, 4 adjustable levels, for both HPS and MH lampsGIB Lighting NXE electronic ballast More light with a lower power consumption, so you can produce a greater yield from the same area Using a suitable reflector, the extra light can be distributed over a larger area SSG SILENT STREAM GRID More cooling with new housing design Longer lamp life thanks to soft start technology Greater light output Light & silent Easy to assemble Electronic ballast No flickering of the light, unlike other standard ballasts