Looking to purchase a couple 600 watt ballasts and was wondering if anyone has any info on the regular 600 watt Galaxy vs. the select-a-watt. The suggested retail price is the same for both but you can get the regular one for about $50 less at various places online. My local hydro shop tells me they are the same besides the select a watt feature, yet they only carry the regular one now. I have used the select-a-watt and have been happy with them. But a $50 savings means more to me than the ability to run them at 400 watts. Any info or experience using them would be appreciated.