The 1000w HPS I am looking at is called the maximizer... made by sunlight supply
http://www.hydroponicsbuff.com/hydro...g_sunlight.htm

this is the 400watt/1000 watt HPS system I have been looking at...if I read this correctly the 1000w is switchable with the 600w or 400w hps bulbs...possibly answering my own question...
https://ssl.cgicafe.com/clients/hmoo..._complete.html

anyone have any thoughts or experiences with these lights...thx in advance- peace