It means it's set up for Envirolites and not HPS or MH. You'll have to rewire the lampholder with an outlet plug that'll fit into a HPS or MH ballast if you want to use the hood in that way.
hey guys i need a little help i am starting my little grow op and i got a 200w buld that needs a 130volts i dont really know what kinda ballest i will need so if any one can help me that would be great p.s i am new to this site so please bare with me thanks lots
