Could u not have got a better intake and carb than ditch the 600. Cant think y its not starting to bud my best guess would be the low wattage = low lumens making it take longer. If you've to bring in a heater y dnt u ditch that and bring back in the 600 that'l raise ur temps n gve u a quicker growth. Only other advice would be boot the cfls n get a 400 or a cooltube they're really good