Hi all,
I recently set up
DIY MH on my 125g. Three 250w 10,000K XM bulbs on magnetic
ballasts. One of the bulbs was on another tank for about a month before I put them all over the 125g. While over the other tank it began to look very yellow. It was tight in its socket. I looked up my problem in the various forums and the best that I could come up with was that some people have better output (not yellowish...I don't have any meters to really test output) when the nipple is at the 3 or 9 o'clock position. I tried this and it worked. But the bulb is no longer tight in it's socket. Is this a problem or is loosened a 1/4 turn ok? I may be able to take the socket apart, but this would only fix the orientation for this particular bulb. Today the bulb started looking yellow again while at the 9 o'clock position. I shut it off, tightened it (nipple in ~12 o'clock position) and restarted it 15 minutes later. It was still yellowish. I left it on for about 1/2 hour and then shut it down, loosened it to the 9 o'clock position and restarted it 15 minutes later. It is back to the white color. Any ideas why this is happening? Any one have similar experiences? And lastly, does anyone know of an easy way to look up
metal halide in the forums using the forum search button when most people use "mh" or "MH" and the search does not work for 2 character words???
