P permagrow Member Dec 19, 2009 #1 when did this come out?> http://www.gelighting.com/na/business_lighting/education_resources/literature_library/ballast/downloads/ultramax_hid.pdf
when did this come out?> http://www.gelighting.com/na/business_lighting/education_resources/literature_library/ballast/downloads/ultramax_hid.pdf
