Upgrade 150 to 250 MH

[mike31154]

I'd advise against messing with a higher power MH in a fixture designed for a certain wattage. With MH you're talking a point source of light and heat concentrated in a relatively small area. Although a well designed commercial fixture will have a certain degree of safety engineered in there, upping the wattage to that degree could be a fire hazard, especially if the ballasts are housed inside the fixture as well.