The electronic/digital ballasts are the best, for the reasons above.

If you want a HPS it'd probably be easier for you to buy a HPS conversion bulb [If need be] and that'll run in your MH ballast.
LIP Reviewed by LIP on . MH ballast I have 2 250 watt MH bulbs, and i was wondering where i could get a ballast for them and what is the difference between electronic and not. Also how many plants can one bulb produce? Thanks in advance for the help. :rasta: Rating: 5