|
|
|
|
|
#1
04-03-2008, 03:45 AM
|
|||||
|
|||||
Please see this thread for some reported T5 values and a comparison to a 250W MH.
http://reefcentral.com/forums/showth...readid=1332562
__________________
SPS Dedicated 24x24x20 Trimless Tank | 20 g Sump | Bubbble King Mini 160 Protein Skimmer w/ Avast Swabbie | NP Biopellets in TLF Phosban Reactor | ATI Sunpower 6 x 24W T5HO Fixture | EcoTech Vortech MP20 | Modified Tunze Nanostream 6025 | Eheim 1260 Return Pump | GHL Profilux Standalone Doser dosing B-Ionic | Steel Frame Epoxy Coated Stand with Maple Panels embedded with Neodymium Magnets "Mens sana in corpore sano" 
|
|
#2
04-03-2008, 04:09 AM
|
|||||
|
|||||
|
Quote:
when I was running my SE AB 10K's on the bottom of a 24" deep tank with the lights 6" above the water I was getting values of 640. he is getting that in about 8" of water and 7" of air. so same readings at 3X the water depth which is the important thing as air made very little difference from 6" to 15" (I was board when my tank was empty once, I also discovered that 1/4" glass only gets rid of 1.823% of the PAR passing through it  this is one of the things I hate about the comparisons, people through them out there testing the top of the line against bottom of the line but neglect to tell you that, If you remember years ago when I first started doing measurements I was threatened by IceCap and they had Reef Central delete all my posts as I proved they were under driving VHO bulbs by using HO electronic ballasts and asked them about it in a public forum. well i am not saying anything bad about T5's I like them and they are what they say they are. And yes you can grow corals under them, as you can with PC's VHO, and even NO's if you are real shallow, but what I will say is they are not as intense as a MH and do not have the same degree of penetrating power as a MH. I do use T5's on my fresh water tank, and while it is a respectable output compared to a lot it is not quite as good as the TeK I have found.. I was actually surprised though as it uses a parabolic type reflector which has two bulbs in it and it is almost as good as the Tek, but not quite. Steve
__________________
 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive.
|
|
#3
04-03-2008, 04:39 AM
|
|||||
|
|||||
|
Steve,
I don't think you can reasonably compare readings from person to person (i.e. your measurements to his). The lack of control for calibration and differences in measurement techniques makes for an unreliable comparison. I read that same (re: the 400W with LumenBright reflector) thread Steve. I actually thought I had posted it in my previous post but I guess I forgot to. Anyway, that 400W MH setup produces considerable PAR. In fact, to the point of photoinhibition. But I don't think you can compare a crappy passively cooled Tek fixture with Workhorse ballasts to 400w 12K Reeflux bulbs with LumenBright Reflectors and a Coralvue ballast. Part of me wishes ReefGeek wasn't so slow to get the PowerModul in when I requested it. Then we would have a high quality T5 fixture to compare things to. Additionally, it has been well documented that, for instance, magnetic HQI ballasts draw significantly more wattage than the stated/rated value. So when people are tossing about comparisons regarding "efficiency" I sure hope they're actually measuring the true wattage drawn and not assuming that because they're running a 250W MH that it's pulling 250W. Ultimately I find the T5 vs MH comparisons tiresome. They both work - it has been well documented and there are plenty of pretty pictures to support the use of both. Pick the attributes that most appeal to the user and go with it. Alternatively take advantage of the strengths and weaknesses of each and combine them.
__________________
SPS Dedicated 24x24x20 Trimless Tank | 20 g Sump | Bubbble King Mini 160 Protein Skimmer w/ Avast Swabbie | NP Biopellets in TLF Phosban Reactor | ATI Sunpower 6 x 24W T5HO Fixture | EcoTech Vortech MP20 | Modified Tunze Nanostream 6025 | Eheim 1260 Return Pump | GHL Profilux Standalone Doser dosing B-Ionic | Steel Frame Epoxy Coated Stand with Maple Panels embedded with Neodymium Magnets "Mens sana in corpore sano"
|
|
#4
04-03-2008, 04:16 AM
|
|||||
|
|||||
|
Quote:
http://reefcentral.com/forums/showth...&pagenumber=12
__________________
*everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive.
|
Hybrid Mode
