already using 1000w HPS from the top, would it be better to use MH or HPS to sidelight? what do you guys think about the dual arc hortillux? is it worth paying double the price of a 1000w HPS? im starting to realize most of you are outdoor guys with free sun but any help or experience is always appreciated!! thanks
edit: which ballast would you use for the dual arc? 1000w HPS, 1000w MH, or the convertible 1000w MH/HPS?