Time to change bulbs and am thinking about switching from ushio to XM. I've heard rumors that XM's need to be replaced more than once a year and am looking for confirmation or debunking. Has anybody done any spectural analysis on bulbs 8-10 monthes old? BTW, I'm running 250 watt mag ballasts (Hamilton I believe). Thanks in advance for any help.
XM vs Ushio bulbs
- Thread starter moumda
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