I know that eletronic ballasts are more efficient than magnetic ballasts, but what is the difference between HQI and Mogul based? I think that the HQI bulbs are just the double ended bulbs, right? All I know about HQI bulbs is that they have to be put behind UV glass because they put out UV light. Any info will help. Might just head up to the meeting, if I have time, I have to work :(