The T5 Q&a Thread

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<a href=showthread.php?s=&postid=10820884#post10820884 target=_blank>Originally posted</a> by HecticDialectic
Well he did say that the 60" bulb T5 did not have a reflector. That's a very big point to consider. A good reflector should add 30-40% light increase over no reflector. Overdrive them and you're looking at another 30% increase in output... So if that 60" bulb had a reflector and was being overdriven, it would have easily doubled the output of the VHO.

I'd take that to mean that a T5 is either going to be the same or higher in output to the same length VHO, but less wattage and heat.


if you go back to his post he compared a 5 foot lamp t-5 to a 3 foot t-12 lamp. Using a IC ballast on a t-5 to overdive will increase the output but then again if you use and IC ballast on a t12 will increase its output as well
 
Does it really matter how long the bulb is? If you take a reading from one spot, let say right in the middle of the bulb, it shouldn't matter if one bulb is longer then the other. The wattage of the bulbs are 75 and 80 a piece. That should be the determining factor.
 
<a href=showthread.php?s=&postid=10820983#post10820983 target=_blank>Originally posted</a> by dphinsx2
Does it really matter how long the bulb is? If you take a reading from one spot, let say right in the middle of the bulb, it shouldn't matter if one bulb is longer then the other. The wattage of the bulbs are 75 and 80 a piece. That should be the determining factor.

With all flourecent bulbs of the same type the longer the more PAR.

In other words a 60" T5HO puts out more PAR than a 36".
 
<a href=showthread.php?s=&postid=10817474#post10817474 target=_blank>Originally posted</a> by kysard1
This is the catch 22 with adding T5's for supplimentation that I am finding. You need a lot of them to keep up with the Halides. In your case they will fit but how are you going to acess the inside of your tank? Remember halides need to be 8" from the water and T5's need to be 4" away. I think this is the reason most still prefer VHO's for suppliment. Per watt the T5's will kill the VHO's, but not per bulb.

I had a custom hood built for my tank with a flip up front and about 10 inches to spare from the top of the water. So acessing the bulbs is not the problem. ( maybe heat ) The reason i had this built is so i could do this exact thing. I heard all the good things about T5s and was tired of fair results with my coral. So im diching my 150w and my 96w PC's for the 250w 14k and 8 T5's of mixed colors, 4 in the front and 4 in the back. I just wanted to know if it was over kill. Maybe go with less T5's, like 2 in the front and 2 in the back or 3 and 3. any ideas???:)
 
<a href=showthread.php?s=&postid=10820983#post10820983 target=_blank>Originally posted</a> by dphinsx2
Does it really matter how long the bulb is? If you take a reading from one spot, let say right in the middle of the bulb, it shouldn't matter if one bulb is longer then the other. The wattage of the bulbs are 75 and 80 a piece. That should be the determining factor.

actually it does matter how long the bulb is
 
<a href=showthread.php?s=&postid=10821253#post10821253 target=_blank>Originally posted</a> by kysard1
With all flourecent bulbs of the same type the longer the more PAR.

In other words a 60" T5HO puts out more PAR than a 36".

to sum this all up if one were to have a 36 inch long tank the florecent bulb that would put out the most light wouldnt be a t-5 bulb bet rather a t-12.
 
<a href=showthread.php?s=&postid=10820469#post10820469 target=_blank>Originally posted</a> by SPACEMANS2
Grim you are almost inenvertantly helping me prove my point WATT PER WATT T-5s may put out more. You are comparing a 60 inch t-5ho to a 36 inch T12 VHO. If you were to do readings of a 36inch T-5 VHO with internal reflector to a 34 inch t-5ho with SLR, Which is as close to the same legth as one can possibly get. VHO would be on top. T-5HOs are energy savers because they put out more per watt but compared to a t12 VHO of the same leghth they dont put out more.

Ummmm, 80 watts produced higher PAR along a 60" tube as compared to 75 watts along 36". The T5 is illuminating 2 more feet of tank length. As far as practical experience I can't think of anyone who has said they got better growth with the VHOs.
 
<a href=showthread.php?s=&postid=10822114#post10822114 target=_blank>Originally posted</a> by SPACEMANS2
actually it does matter how long the bulb is

No. It's not the same as a metal halide. A metal halide would work that way because it's a point source. A flourescent is X lenght, and at any point along that length, it's going to be making just about the same amount of light as another point...
 
Hello all I just changed my 175W MH from a blueline 14 K to a XM 20 K and my tank is much brighter and not as blue now
I now use one Blue + and one super actinic T5
Its just about time for 2 new t5s also so what would you suggest I do like a bluer tank ,should I do 2 Blue+
 
Originally posted by Tom Foolery
Hey Grim,

I have a 72g bowfront that I am setting up as a mixed reef. I have a ATI Tx5 setup with the following bulbs:

Front
Blue Plus
Super Actinic
UVL Aquasun
Aquiablue
GE 6500K Daylight
Blue Plus

Now, I am not really digging the blue cast that it has and would like to get to a more daylight-ish/white configuration, if anything I would like to have just a small blue cast. Do you have any recommendations on different bulbs? Thanks.



Put your Aquablue in the first position and see what that does. If you still want it brighter try getting a second Aquablue in place of one of the blue pluses

Hey Grim,

Thanks for all your advice, however, I ended up making one small mistake with my bulb config. I dont know where that came from exactly, but the true layout is this:

Front
Blue Plus
AquaSun
SuperActinic
Aquablue
Blue Plus

I will go ahead and swap the aquablue and blue + like you said, but please, if you have a different suggestion because of the mix up, please let me know. Thanks! :)
 
<a href=showthread.php?s=&postid=10822513#post10822513 target=_blank>Originally posted</a> by HecticDialectic
No. It's not the same as a metal halide. A metal halide would work that way because it's a point source. A flourescent is X lenght, and at any point along that length, it's going to be making just about the same amount of light as another point...


again not true. from what you are saying in your case a single 3 foot flourecent bulb would produce the same amount of PAR as 2 or more 3 foot bulbs stacked next to each other. have still not bought my my thoughts? think of this. If you are in a room that is 50 sq feet. and you wanted to getthe highest par reading from a flourecent lamp. your optoins are a 1 foot tube vs a 10 foot tube both with the same diameter. which one would give you the most light ? better yet which would give you the most par? It would be the 10 foot tube because it has a 9 foot advantage of "extra light" on either side of the 1 foot being measured therefore supporting the par readings of the 1 foot being measured.
 
Hey Grim, I'm planning on having a tank made and was wondering how deep you think I could safely make it and still keep sps frags on the bare bottom. I will be using my 36" TX5 using 3xActinic Plus, Super Actinic, and an AquaSun. I may switch one Actinic+ for an aquablue, but i haven't decided yet.

Your posts here helped convince me to get the TX5 after my Nova Extreme completely died on me after 17 months. It was an excellent upgrade and I can already see a big difference in my tank. Thank you for all your help!
 
<a href=showthread.php?s=&postid=10822491#post10822491 target=_blank>Originally posted</a> by The Grim Reefer
Ummmm, 80 watts produced higher PAR along a 60" tube as compared to 75 watts along 36". The T5 is illuminating 2 more feet of tank length. As far as practical experience I can't think of anyone who has said they got better growth with the VHOs.


in 36 inch system you couldn't fit a 60 inch tube. I agree with you that you probably can't think of anyone who has said they got better growth with the VHOs because there arnt many who have had VHOs as there sole lighting source. I make my claims from EXPERIENCE with a SOLE four bulb T-12 URI with internal reflector system ran off an Icecap ballast and a SOLE four bulb T-5HO ice cap SLR reflectors and ballast system .
 
<a href=showthread.php?s=&postid=10820850#post10820850 target=_blank>Originally posted</a> by InsaneClownFish
Grim,

I'm planning my build of a 22g Zero Edge open top overflow tank as pictured here:
http://www.zeroedgeaquarium.com/zeroblog/wp-content/uploads/2007/06/zeroedge7.jpg

24x18x12deep

I'll be using the hanging tree, and I am leaning towards an Aquactinics Tx5 24w x 5.

I'll be keeping some zoos and rics along the edge and bottom, but I'd like to focus on sps around the center of the tank along with a maxima and possibly a crocea.

Would this be enough light to effectively grow and color up sps? Any thoughts or suggestions on a mounting height would be greatly appreciated.

From everything I've read here, I'm thinking a good bulb combo would be as follow:
Front
ATI Blue +
GE 3000k
KZ Fiji Purple
UVL 75/25 14k
ATI Blue +

Thanks! :rollface:

I think I would do an ATI Aquablue instead of the UVL lamp. With the Fiji Purple anf the GE 3000 the last thing you want is that UVL lamp, it looks a little pinkish.
 
Thats good.. I was thinking 20" but hoping to nudge it up a bit.. I probably wouldn't keep sps on the bottom long term, but its nice to know my options are open. Thank you :)
 
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