depends on size of room for best size light

600s give better lumen per watt. i like 600s

i just bought a digi ballast 600 from here and it was bright cheap and 2 yr warranty
NEW Digital 600 w HPS hydroponic ballast grow light kit - (eBay item 270164548278 end time Sep-17-07 12:22:10 PDT)
texas grass Reviewed by texas grass on . Digital actually brighter? So everyone selling digital ballasts says that they burn the bulbs brighter by x percentage (20-30) over coil core types. If thats the case........... Wouldnt it just be smarter to use 600s instead of 1000s? I looked at the lumens for hortilux and its 88K for the 600 but 145 for the 1000.........thats hard to believe but Ill let you all educate me Rating: 5