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10/12/2009, 10:43 PM | #1 |
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Should I upgrade to T5 or MH?
I have a 95g tank (48L x 18W x 28H) currently running on 520w of PC. Stupid move buying the PC's in the first place, but oh well. It's been over a year now and the stock bulbs are noticeably fading. Time to upgrade!
After reading countless threads, I still can't decide between T5's or MH's. The two setups I'm considering are: 2x 250w MH DIY------ Undecided electronic ballast Bulbs: probably these to start with. Good reflector like lumenarc or similar. OR 7x 48" 54w T5-------- Undecided bulbs Parabolic reflectors Either Workhorse or Sylvania ballasts My current lighting can just barely support red monti, with virtually no growth and bad color. I'm wanting to be able to keep SPS like acro with good color and decent growth, along with LPS, rics and zoas. Of the two options listed, which would be a better choice if either? Other suggestions are welcome. Last edited by black_ice_pc; 10/12/2009 at 11:10 PM. |
10/12/2009, 10:46 PM | #2 |
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your tank is pretty tall..i would go with 2 250's with a lumenarc mini reflector..but thats just me lol-drew
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10/12/2009, 10:58 PM | #3 |
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mh no doubt, especially at that depth 28".
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10/12/2009, 11:09 PM | #4 |
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I agree about the height, but I'm planning on keeping mainly zoas and rics on the bottom. Then LPS mid to top, and SPS up top. Given that config, would you still say halides?
I also just realized that 7 T5's would fit over the tank. I'm leaning towards the halides myself, but want to see others' opinions. |
10/12/2009, 11:31 PM | #5 |
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MH for sure... and do yourself (and your tank) a favor and skip the eBay bulbs. I guarantee if you buy those first, you'll just end up buying quality bulbs soon after.
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10/12/2009, 11:35 PM | #6 |
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I think they are both good options, but I would go with the T5's personally. SPS would do fine on the top half of the tank and the zoas/rics and LPS would do great down lower.
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10/12/2009, 11:48 PM | #7 |
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One other issue: heat. The tank is in my bedroom. We keep the house at 79 but my tank sometimes gets up to maybe 82. My current fixtures are sitting above the tank with ~1.5" clearance, and run for 9 hours. I would hang the MH's or T5's. If I hang the halides say, 8" above the tank and ventilate the pendants with fans, would I still have heat issues?
SaltFreek --- Do you have experience with those bulbs? What would you recommend instead? Cheaper the better lol. MCCOOL--- Why would you go with T5's over halides? |
10/12/2009, 11:53 PM | #8 |
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Why not both? At 48" you can find plenty of fixtures that have dual 250w halides and also have 4 t5s. If you're doing one or the other I would go with MH.
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10/12/2009, 11:58 PM | #9 |
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That would definitely be optimal, but I'm worried about keeping heat under control and I'm working on a tight budget. That's why both of the options I put are DIY lol.
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10/12/2009, 11:59 PM | #10 |
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Thanks for the input guys, keep it coming!
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10/13/2009, 12:02 AM | #11 |
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You would save over 100 watts which would be alot less heat to deal with, also to get good colors with the mh you would need actinics or 20k bulbs but with the 20k bulbs the growth wouldn't be the best. With the T5's you can get great color and growth, all with minimal heat.
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10/13/2009, 12:04 AM | #12 |
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I'll admit I've only ever had T5's so I'm probably a little partial haha
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10/13/2009, 12:05 AM | #13 |
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If heat is a concern than I think you personally need to go with T5s. To get enough light for a solid reef in a 90 you would have to have at least 2- 250watts which make a lot of heat. You can always have a fan blow between the lights and the tank, but that only does so much.
I also fully agree that unless you do 20k bulbs you need actinics to help the color. I use phoenix 14k and they are just too white if my actinics are off. |
10/13/2009, 08:23 PM | #14 |
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I would go with halides. I have always been pleased with my tank when using MH.
I have been running Hamilton Cayman Sun 250W HQI Pendants over my tank for a few months now and am very happy with the results. http://www.hamiltontechnology.com/sh...w&cat=Specials |
10/13/2009, 08:52 PM | #15 |
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You could even go with 175w Iwasaki 15k bulbs, they give off as much PAR as some 250 watt bulbs. Color is a bright crisp white.
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10/13/2009, 10:55 PM | #16 |
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I think you would get more light to the bottom of the tank with a GOOD T5 fixture or retro. I can grow anything on the bottom of my 75 including acros. The extra 6 inches deep your tank is would not make much difference. I have a 8 bulb TEK fixture. You could probable get away with 6 bulbs as long as you go with high par bulbs like Blue+ for the blue bulbs. And best of all much less heat.
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10/13/2009, 11:30 PM | #17 |
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Ok so now the sides have split. The supplemental actinic lighting for the MH is definitely a con to me, and the lower power and heat of the T5's is definitely nice. That might be the deal breaker for me.
If I were to DIY a T5 setup, I'd most likely be using Ice Cap 2.5" parabolics, so I could just barely fit 7 bulbs over the tank, but the edges of the outer reflectors would probably just dump a good bit of light on the floor. 6 would be more practical, but that's less light. If I got a TEK 8 bulb that would maximize the bulb count above the tank. Might be the way to go, although price is much more than DIY. I guess that's just how it goes. I wonder what PAR readings I could expect from the T5's vs. MH. Reefun----- How wide are the reflectors in the TEK? I know they're individual parabolic, right? But I've never heard how wide they are that I can recall. |
10/14/2009, 01:19 AM | #18 |
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you can use Aquatinic reflectors, at last check they were the narrowest available and are high quality. With those and IC ballast and high quality bulbs, you shouldn't have any problems with SPS quite a ways down in your tank.
My tank is 25" tall and i keep SPS right off the sand bed with clams on the sandbed. |
10/14/2009, 07:31 AM | #19 |
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I've used T-5s since the beginning, about to set up my new tank with MHs just to have the shimmer effect.
Going for 1x250s over a 40 breeder for now |
10/14/2009, 08:13 AM | #20 |
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I have this same dilemma. I'm planning a 120g now and I like the MH but I keep reading how people switched to all T5's. I think 8 T5's would be the max I could fit over a 120 but at 54w each I don't get how that's enough light without MH.
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10/14/2009, 09:12 AM | #21 |
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Jared J-----
The way I understand it, T5's are more efficient at producing light, aka more lumens per watt. So even though there's not as many watts, there's more light for every watt of power used. Watts are a measure of power used (Watts = Volts x Amps) and lumens, PAR etc are a measure of light. So if I went with 8 x 54w T5, I'd have 432 watts of power used. If I used the 2 x 250 unsupplemented MH, I'd use 500w of power. So that's 68w difference, which isn't much. But the T5's are more efficient. So now that I'm thinking about it this way, I'm seeing that, depending of the quality of bulbs, reflectors etc there might be more available light (at least mid-high) from the T5's. Any experts want to chime in here? Grim? |
10/14/2009, 07:24 PM | #22 |
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And this grows SPS's well? I'll have to try it. If I can keep the wattage down I may not have to run a new circuit. If I used a 2 MH fixture it would be 760w with the actinics. 432w sounds better to me. What about using the IceCap ballasts and getting 84 watts out of the bulbs instead of 54?
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10/14/2009, 07:53 PM | #23 | |
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Quote:
Good luck.
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10/14/2009, 07:59 PM | #24 |
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Alright I will chime in for you.
You will only need 6 bulbs over that tank. Squeezing 7 in will only light your floor and last time I checked the carpet doesn't grow too well! Go to reefgeek and get the Aqua Illumination reflectors. You don't need the Ice Cap ballasts. Just get the standard High Output ballasts. For bulbs do this: ATI Blue Plus UVL 75/25 ATI Blue Plus KZ Fiji Purple ATI Blue Plus ATI Blue Plus Also look at ordering an extra ATI Aquablue just in case the above combo is too blue for you. Trust me, you will have no problem keeping any SPS down to 22" or so. I would bet low light SPS would grow on the sand bed even. You have to remember that more of the coral is getting hit with light when using T5's. The light is spread out with T5 where as with MH it is a point source light which causes a lot of shadows. This is an easy choice in my opinion.
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Ryan Click on my user name and check out my homepage! Current Tank Info: 50g Cadlights/Giesemann Spectra (250w Radium, 2 ATI Blue Plus, 2 ATI Actinic)/2 x Vortech MP10wQD/Skimz SN123/Eheim Compact 3000+ |
10/14/2009, 08:59 PM | #25 | |
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ballast, diy, fluorescent, metal halide, upgrade |
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