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Old 05-14-2013, 04:13 PM   #851
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Would this be good enough for a 40g
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Old 05-14-2013, 04:57 PM   #852
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Why with the taotronics do you need 2 units for a 4ft tank? Is there anyway to get away with 1 unit centered?
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You might be ok w/ 1 light, but you'll likely get some fall off at the edges. Try it with one and see how it works. I've got it centered over my 40b (36"s wide). I don't know if there would be that much fall off 6"s either way. I think the idea of 2 units over the 4 feet is for consistent lighting.
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Thanks for that. I may have to go with 1 for now at least see how it looks than I can always add a second.
This is what my tank looks like. Tao is 15"s above top of tank, whites and blues are both about 50% give or take. I centered a 4' level on the tank, I bet with the lights turned up it would work well. I'd start with one and see how the corals like it.
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Old 05-14-2013, 05:43 PM   #853
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Would this be good enough for a 40g
Some simle math based on the light details;

28 LEDs at 3W each = 84 W

3100Lm / 84w = 36.9 lm/w

That is LOW. Not just low, but very low.
BridgeLux are producing aquarium LEDs around 120 lm/W and Cree are even better.
And that does not account for PAR values, and with a 20:8 White:Actinic ratio, which is low (50:50 seems to be preferred), the PAR values will be even lower.
Other issues: single switch/plug limiting to not switching actinic on before whites. Price?
I doubt that would support a full array of SPS/clams/anemones in a 40 gal, 16" deep tank.
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Old 05-14-2013, 08:44 PM   #854
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Thanks for that. I may have to go with 1 for now at least see how it looks than I can always add a second.
If you plan to grow anything more than softies not directly under the lights, your not going to get much growth if any. Directly under depending on depth and optics you should alright. I am upgrading a 30 inch tank I have to a 3 foot 60 and I can tell you right now, I am going with two with 90 optics units. These lights are good but I would use the recommended amount for your tank, which is two units.
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Old 05-14-2013, 08:56 PM   #855
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If you plan to grow anything more than softies not directly under the lights, your not going to get much growth if any. Directly under depending on depth and optics you should alright. I am upgrading a 30 inch tank I have to a 3 foot 60 and I can tell you right now, I am going with two with 90 optics units. These lights are good but I would use the recommended amount for your tank, which is two units.
Currently I have a handful of corals. I have a torch, frogspawn, hammer, candycane, pulsing xenia, some zoas, branching goni, open brain, bubble coral, duncan coral, and variety of mushrooms. Probably some others I am forgetting. I guess I'll have to either keep the 4 bulb t5 I have now, or splurge for the 2 units like I originally was planning on doing. I feel if I'm going to have to spend the money to replace the bulbs or upgrade to a 6 or 8 bulb unit may as well spend the money 1 time and go for the LEDs. Sounds most logical. I just have to keep telling myself that the lighting system is not something to cut corners. I just don't want to spend $300 for 2 units
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Old 05-14-2013, 09:36 PM   #856
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Just a thought.... if anyone has ever tried or experimented mirrors as reflectors in the tank. With one narrow or square fixture like the Taotronics reflecting the lights where your want them to go. Might be cumbersome but can save you some amount.
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Old 05-14-2013, 09:58 PM   #857
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Just a thought.... if anyone has ever tried or experimented mirrors as reflectors in the tank. With one narrow or square fixture like the Taotronics reflecting the lights where your want them to go. Might be cumbersome but can save you some amount.
That's an excellent idea. If anyone has done this please let me know how so I only need to spend half lol.
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Old 05-14-2013, 11:00 PM   #858
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Just a thought.... if anyone has ever tried or experimented mirrors as reflectors in the tank. With one narrow or square fixture like the Taotronics reflecting the lights where your want them to go. Might be cumbersome but can save you some amount.
They don't have optics. The spread is excellent.
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Old 05-14-2013, 11:07 PM   #859
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They don't have optics. The spread is excellent.
Doug, do you think since the spread is so great that I can get away with 1 unit for my 55? I feel that with your experience maybe I can do the 1 unit? Most of my corals are centered anyway.
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Old 05-15-2013, 05:53 PM   #860
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You may be the first to experiment it Tom. Just hang 2 mirrors of same dimension as Taotronics at same height on both sides. Just tilt these mirrors reflecting the water surface below Taotronics back to both far sides of tank. Im pretty sure it will help brighten up those areas.
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