250 Iwasakis

[pocilipora]

I bought one Iwasaki bulb about 2 weeks ago to replace the oldest of the two that Im currently running. My question is how long does it take to break in and become its full intensity? Ive heard 100 hours running time. Its been 140hrs.
Right now it is noticably not as bright as the old bulb. I tried swithching ballasts and still no difference. Any thoughts