LF/ old 20000k bulb 250 DE

[2bafish]

I want to try out a 20000k bulb on my tank. Just to see what it looks like before i buy a new bulb. I was looking at xm 20000k but i am willing to try out any brand. So if you got one lying around or just about to change bulbs let me know. Il take one from you. If you want something for the old bulb im willing to give you something for it.
250 watt DE. THANKS