WMAS Discussion Forum : 20K XM users http://www.utahreefs.com/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 15 Jun 2026 14:28:15 +0000 Mon, 05 Apr 2004 21:41:26 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.03 360 www.utahreefs.com/forum/RSS_post_feed.asp?TID=2269 <![CDATA[WMAS Discussion Forum]]> http://www.utahreefs.com/forum/1by1.gif http://www.utahreefs.com/forum/ <![CDATA[20K XM users : Yup, I say you&#039;d bea bit...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21815&title=20k-xm-users#21815 Author: jfinch
Subject: 2269
Posted: April 05 2004 at 9:41pm

Yup, I say you'd be a bit crazy to operate an HQI bulb without proper UV protection (even if you don't care about your fish/coral consider your own rods and cones).  You need to be looking for some glass .

Edited by jfinch]]> Mon, 05 Apr 2004 21:41:26 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21815&title=20k-xm-users#21815 <![CDATA[20K XM users : I did ALOT of research on that...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21813&title=20k-xm-users#21813 Author: ssilcox
Subject: 2269
Posted: April 05 2004 at 9:37pm

I did ALOT of research on that topic. Some HQI/DE bulbs will actually have UV shielding built in, but most dont. They let out UV A, B, and even C. What did it for me was realizing that my MH bulb was putting out the same UV light I was using in my UV sterilizer to kill things.

Check out this link. It is backed up with numbers on how much UV glass blocks as well as the wavelengths, and even how much UV is given off by a 250w hqi bulb.

http://www.reefland.com/forum/showthread.php?t=6294&page =4

-Shane

]]> Mon, 05 Apr 2004 21:37:59 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21813&title=20k-xm-users#21813 <![CDATA[20K XM users : Thanks everyone. Just the type...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21805&title=20k-xm-users#21805 Author: Adam Blundell
Subject: 2269
Posted: April 05 2004 at 9:19pm

Thanks everyone.  Just the type of stuff I was looking for.  One more twist...
I do have an HQI bulb, which Silcox sees as needing UV filtering.  Anyone else have ideas on that?

Adam

]]> Mon, 05 Apr 2004 21:19:00 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21805&title=20k-xm-users#21805 <![CDATA[20K XM users : A little occassional cleaning...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21802&title=20k-xm-users#21802 Author: Carl
Subject: 2269
Posted: April 05 2004 at 9:10pm

A little occassional cleaning O' the bulbs will get rid of the spray ans subsequent salt spackle. The way I figure, for the shatter thing to really happen it needs to be a grand and rapid cooling of the bulb. My bulbs are about 4 inches above the water. They get splashed, burn hair, etc. Nothing yet and I don't see it as a concern unless something REALLY goes wrong.]]> Mon, 05 Apr 2004 21:10:42 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21802&title=20k-xm-users#21802 <![CDATA[20K XM users : If you look at the tests done...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21788&title=20k-xm-users#21788 Author: ssilcox
Subject: 2269
Posted: April 05 2004 at 8:42pm

If you look at the tests done by Sanjay on the amount of light that gets blocked/reflected off just by adding glass it is actually alot more than you would think. If I didnt have to have the glass I probably wouldnt.]]> Mon, 05 Apr 2004 20:42:02 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21788&title=20k-xm-users#21788 <![CDATA[20K XM users : My bulb is probably 4 inches above...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21786&title=20k-xm-users#21786 Author: Adam Blundell
Subject: 2269
Posted: April 05 2004 at 8:37pm

My bulb is probably 4 inches above the water.  I've seen how much salt builds up on my compacts, and that was why I was asking.  However, I also thought about the bulb shattering and then thought... "why not put a piece of glass there, nothing to lose".  So still trying to get a better feel.

Adam

]]> Mon, 05 Apr 2004 20:37:46 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21786&title=20k-xm-users#21786 <![CDATA[20K XM users : I think I would be worried about...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21783&title=20k-xm-users#21783 Author: tileman
Subject: 2269
Posted: April 05 2004 at 8:09pm

I think I would be worried about water, and with the HQI bulbs dont you think you should have some kind of UV  shield on it?

I,ve had 2 96 w pc bulbs break because of just the mist from my tank and at 40 bucks a pop that hurts

]]> Mon, 05 Apr 2004 20:09:40 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21783&title=20k-xm-users#21783 <![CDATA[20K XM users : Adam, how close to the water are...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21782&title=20k-xm-users#21782 Author: jfinch
Subject: 2269
Posted: April 05 2004 at 8:04pm

Adam, how close to the water are you planning to place the bulb?  If you're only a couple inches then I would put it behind glass, but if you're more then a couple I'd leave the glass out, jmo.]]> Mon, 05 Apr 2004 20:04:32 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21782&title=20k-xm-users#21782 <![CDATA[20K XM users : I also run the 20k XM&#039;s one...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21779&title=20k-xm-users#21779 Author: jbruse
Subject: 2269
Posted: April 05 2004 at 7:26pm

I also run the 20k XM's one on at 8am off at 10pm and the other on at 9am off at 11.   No glass or acrylic and no I am not to worried about them getting splashed on.]]> Mon, 05 Apr 2004 19:26:47 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21779&title=20k-xm-users#21779 <![CDATA[20K XM users : I run Ushio 20k ... they come...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21772&title=20k-xm-users#21772 Author: ssilcox
Subject: 2269
Posted: April 05 2004 at 5:45pm

I run Ushio 20k ... they come on at 10 and go off at 8, no actinics. I am running HQI so I run a 1/8" piece of tempered glass to shield the UV.

]]> Mon, 05 Apr 2004 17:45:05 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=2269&PID=21772&title=20k-xm-users#21772