LED lighting for 90gl tank

[xeanliao]

Hi, I would like to keep some GBTA in my 100 gl tank. Do you think the following lighlighing is good enough:

Fixture Size: 29.50" x 7.50" x 1.25" (Add 0.65" in height with bracket installed)
LEDs Count: 110
4000 Lumens approx
Super energy efficient 0.5 watt high output LEDs
95x 10,000K LED
15x Actinic 460nm LED
Use 55 watts approx​

My tank is about 2-feet deep, 90 gallon display tank with 20 gallon sump. Currently there are only 2 clownfishes, one randle gobby and a scooter dragnet. I think if I can keep BTA, the lighting probably be good enough for many low/medium light coral later, do you think so?

 

[lpsouth1978]

At 0.5W each, I would be inclined to say no. The light may "appear" bright to your eyes, but would be seriously lacking in terms of what the GBTS's need. All quality LED units use a minimum of 3W LED's (though some run them at 2W). Unless you could guaranty the GBTA's stayed at the TOP of the tank, You would most likely not have enough light to sustain them long term.

 

[xeanliao]

At 0.5W each, I would be inclined to say no. The light may "appear" bright to your eyes, but would be seriously lacking in terms of what the GBTS's need. All quality LED units use a minimum of 3W LED's (though some run them at 2W). Unless you could guaranty the GBTA's stayed at the TOP of the tank, You would most likely not have enough light to sustain them long term.

Thanks, good to know the 3W thing!
How about this one (from Green Element EVO):

Dimensions - 47.75" x 5.00" x 1.00"
Includes 32 LEDs
4320 Lumen
3W watt LEDs
24x 10000K LEDs
8x Actinic 460nm LEDs​

There is another configuration that doubled the LED/lumens. I heard too much light could damage some corals. Consider my tank size, would you recommand 32 or 64 LED for GBTA?

 

[lpsouth1978]

Go with the 64 LED version if you decide to get that light. Being and avid LED user, I would shy away from ANY LED fixture that is not dimmable. 64 LED's will certainly not be over kill for most any coral. If it is you can suspended it higher above your tank.

Many people with a tank the size of yours will use 2 x 165W dimmable LED fixtures. That is a total of 110 LED's, and they are dimmable. You can search 165W dimmable LED on either ebay or amazon and it will bring up a number of options for you. 2 of these will cost about $50 more than the one you asked about (64 LED version), but will be a better option. Here is a link to one of these lights. It also covers more of the total spectrum with red, green, and violet LED's in the mix.

http://www.amazon.com/Galaxyhydro-5...9&sr=1-2&keywords=dimmable+led+aquarium+light

I hope this helps.