The Mac Tech 9 Maxi has been upgraded, for 2010, to use the SPH Series bulbs. We found the 575 watt bulb to be TWICE as bright as our previous bulb and only 10% less than the 750 watt bulb! We outperform existing par lights by using 575 watt or 750 watt bulbs along with our high output parabolic reflector and 8″ interchangeable lenses