Nextgen makes the best ballasts in my opinion...it is the only one that is rated to run a 65 foot light cord :jointsmile:

i do know they make a 400/600 watt model...not sure about the 1000's if they make a switchable wattage model but the fact they can run 65' lamp cord tells me they are putting the juice to your bulb better than others if they can't spec a longer cord than 15' :thumbsup: