In the words of the distributor.

Meet the Sun System Galaxy electronic ballast.

This state-of-the-art ballast is manufactured to provide todayâ??s serious grower with maximum flexibility & performance. The Galaxyâ?˘ Select-a-Wattâ?˘ is different than any other â??dimmableâ?ť electronic ballast on the market. The Galaxyâ?˘ brand name carries a strong reputation of reliability and performance. There are three ways to use the Select-a-Wattâ?˘ feature:

â?˘ It will properly drive a 400, 600 or 1000 watt lamp to ANSI specifications. For example: Set the switch to 400 watts, insert a 400 watt lamp into your socket and the ballast will operate the 400 watt lamp. The ballast will similarly operate 600 or 1000 watt lamps.

â?˘ The second option for this ballast is dimming a 1000 watt lamp. Adjust the switch to 400 or 600 watts and the ballast will dim the 1000 watt lamp by 40 or 60%.

â?˘ The Turbo Charge feature will increase the output of a 1000 watt lamp (only) by approximately 10%. You will achieve peak performance, but this may decrease your lamp life.

Lamps are only dimmable on wattages lower than the specified lamp wattage. A 1000 watt lamp can be dimmed down to 600 watt or 400 watt. A 600 watt lamp can be dimmed down to 400 watt, but cannot be over-driven to 1000 watts.

Turbo Charge is designed for 1000 watt lamps only. Do not use with 400 watt or 600 watt lamps. This can be hazardous.

Multi-Watt: 1000W, 600W, 400W
Dimmable
What I gather is this is the ONLY digital ballast that does all this.
WashougalWonder Reviewed by WashougalWonder on . Galaxy Digital Ballast feedback??? Looking at investing in the multi wattage digital ballasts. So far, I think the Galaxy 1000, HPS/MH, 400-600-1000 watt settings, can run bulbs at full power or reduced power (does that make bulb last longer?), and supposedly less heat. Not sure which puts out how much, but 1000 watt bulb puts out a lot of heat. Anyway I like the ability to use at any wattage and to use either HPS or MH. With some of my experimenting I need more flexibility. So, since it is a $400 investment, is it Rating: 5