<a href=showthread.php?s=&postid=9706946#post9706946 target=_blank>Originally posted</a> by Marko9
Tom- A 14k Bulb? I thought you were a 10K guy all the way
. I made the switch a month ago and have never looked back.
Switched from what to what Mark ? I am still trying to decide the best way to go with our tank. Ever since we scored all of those blastos, micros and zoas I have been thinking of changing the lighting. Ever since we moved some of our zoas out to the prop tank (lit by a T5 setup with some actinics in there) and the wife saw how the zoas popped, I have been looking to add some more in the 420nm - 450nm range to our main tank.
<a href=showthread.php?s=&postid=9707708#post9707708 target=_blank>Originally posted</a> by prodman
Tom- The blv 14k are not going to give you any more pop that your 10k. They are white at best. You need to try the reeflux
Paul, I read on the zeo forum where you had one of the BLV 14k bulbs.. was it 250W or 400W ? Were you running an HQI, mag or E ballast ? and from what you are saying here, you aparently didn't like it much ?
From what I have read, the Ushio/BLV Nepturion 14k has a significant amount more in the 420 - 450 nm range than the XM, or a few others I spot checked. I did a spectral plot comparison between the various bulbs and when the plots are overlaid over each other, it is really easy to see which ones have more potential to make the corals pop and which ones don't. But that is all just text book crap... real world results often tell a different story. I will let you know how our story turns out

. Or maybe if it all works out, some new pictures from our tank will help tell the tale (ok, so now I am just being overly optimistic

).
<a href=showthread.php?s=&postid=9707729#post9707729 target=_blank>Originally posted</a> by Unarce
Tom - The Ushio 14k went yellow on me after 6 months. It might have been because of my HQI ballast. Just wanted to let you know
Karl, was your Ushio 14K the 250W or 400W version ? I see you reported using an HQI ballast, that is still odd for it to go yellow like that. Where did you get your Ushio 14K from ? Was it branded BLV or Ushio ?
We are looking to go from 250W XM 10k on an HQI ballast to 400W Ushio 14K on an Electronic ballast. Our photo period is currently 9 hours, we will likely be moving to 10 hours within the next mont or so.
Here are the numbers of our current lighting setup :
XM 10k 250W on HQI Ballast
PPFD: 182
CCT: 9921
Amps: 3.27
approx $$ per bulb per month @9 hours: $38
approx $$ per bulb per month @10 hours: $42
And the one we are thinking of moving to :
Ushio 14k 400W on E Ballast (Same as the BLV Nepturion 14K)
PPFD: 152
CCT: 13648
Amps: 3.77
approx $$ per bulb per month @9 hours: $43
approx $$ per bulb per month @10 hours: $48
Other bulbs we are considering :
Giesemann Coral (14.5k) 400W on E Ballast
PPFD: 157
CCT: 11354
Amps: 3.53
approx $$ per bulb per month @9 hours: $41
approx $$ per bulb per month @10 hours: $45
Right now Sanjay is using the 400W Giesemann Coral lamps on IC E ballasts over his tank that is almost the exact same dimensions as our (ours is 6" shorter in length and height than his) and he ran tests with a meter and says that pretty much all of his tank gets more than enough light for SPS. He has a pink milli 4: above the sand bed that has kept it's color and grown nicely (that was one real world example he used to support his findings with the meter)
Since our tank is 24" tall, versus his 30" tall tank, we should be able to enjoy similar results. Both he and I use LA III reflectors that are approx 9 1/2" off the waterline to the bottom of the reflector.
I am not sure why your Ushio went yellow like that, but it did start out pretty close to that more yellow spectrum, but the PAR looks to have been off the chart (along with the power consumption

)
Ushio 14k 400W on HQI (Same as the BLV Nepturion 14K)
PPFD: 214
CCT: 10026
Amps: 5.24