any ideas on a bulb?

[cloak]

My 175 watt SE XM 20,000K bulb has got about a month left before I change it. I'd like to try something else next. Any other good 20,000K bulbs out there I should give a try? I'm using an older magnetic Hamilton ballast if it makes any difference.

Thanks.

[cloak]

Burp alert?

[brokereefer617]

i love 14k ushios but it depends on the color you are looking for
Are you running any supplement actinic with the mh?