Which of these light would you go with?

[RAULYN]

I'm new to the hobby and I'm at the point where I want to start adding corals to my tank, but before I do so I need to get me some lights.
I found these, but they all look the same to me (provably they are).

1 (http://www.amazon.com/TaoTronics-TT-AL09-Dimmable-Aquarium-Output/dp/B0092LXQRM/ref=sr_1_13?ie=UTF8&qid=1370272429&sr=8-13&keywords=aquarium+light+led), 2 (http://www.amazon.com/TaoTronics-TT-AL01-Aquarium-Output-Ratio-/dp/B0058RXPOS/ref=sr_1_82?ie=UTF8&qid=1370272480&sr=8-82&keywords=aquarium+light+led), 3 (http://www.amazon.com/Aquarium-Coral-Light-Dimmable-White/dp/B00BT4IEW2/ref=sr_1_166?ie=UTF8&qid=1370272551&sr=8-166&keywords=aquarium+light+led), 4 (http://www.amazon.com/Aquarium-Coral-Reef-Grow-Light/dp/B00CPRI7FQ/ref=sr_1_206?ie=UTF8&qid=1370272579&sr=8-206&keywords=aquarium+light+led) , 5 (http://www.amazon.com/TaoTronics-TT-AL02-Aquarium-Output-Ratio-/dp/B005INXMOA/ref=sr_1_224?ie=UTF8&qid=1370272594&sr=8-224&keywords=aquarium+light+led)

Which one would you go with. I'm planning on getting 2 since my tank is a 75g

[Lostinthedark]

I have the lights your looking at. They are affordable and they do grow coral. After using them for over 2 years with ok SPS growth and very good LPS growth I am looking to upgrade. I feel they are lacking the spectrum that most corals need. For a few dollars more check out Oceanrevive or Reefbreeders. The Tao Tronics are noisy. I switched the fans in mine to quiet them down.

Tom

[Ron Reefman]

None of them! Especially the TaoTronics. No lenses on the leds and noisy fans. The only 'inexpensive' Chinese leds I'd trust are EverGrow and Twilight. You want full spectrum leds, not just blue and white, you want more blue than white (between 3:2 to as much as 2:1 or more) and you want lenses on the leds.

Look at EverGrow's D120 by Googling OceanRevivellc, or Reef Breeders (they rename the EG fixture to 'Value Fixture). Or look at OceanRevive's Arctic S026. It's new and it's a bit more expensive, but it's better than the D120 or the Value Fixture. It's better looking (slimline case) and has better light spread and cooling. I just got one for my 24g frag tank and I'm getting 2 more for my QT.

[RAULYN]

None of them! Especially the TaoTronics. No lenses on the leds and noisy fans. The only 'inexpensive' Chinese leds I'd trust are EverGrow and Twilight. You want full spectrum leds, not just blue and white, you want more blue than white (between 3:2 to as much as 2:1 or more) and you want lenses on the leds.

Look at EverGrow's D120 by Googling OceanRevivellc, or Reef Breeders (they rename the EG fixture to 'Value Fixture). Or look at OceanRevive's Arctic S026. It's new and it's a bit more expensive, but it's better than the D120 or the Value Fixture. It's better looking (slimline case) and has better light spread and cooling. I just got one for my 24g frag tank and I'm getting 2 more for my QT.

Thanks for your response guys. Ron, any reason for the full spectrum? What difference would that make? The only reason I'm asking is because I have 4 LFS in my area ( lucky me :twitch: ) and they all have just blue and white.

[Ron Reefman]

The blue and white only fixtures work and you can even grow corals with them. But the full spectrum leds offer a better 'range' of colors that the the coral's zoanthealia use for photosynthesis. And why buy a brand new light that is older technology when you can get better for the same price or even cheaper? Look at OceanRevive, EverGrow or Reef Breeders. They all sell good quality fixtures. I just got an OR Arctic S026 for my frag tank and I love it. The slimmer case is way better looking, the leds are spread for a much better foot print of light and the fans are the best, dead quiet and the fixture stays at room temperature and it comes with the upgraded adjustable hanging kit! It's the best 'cheap' led fixture on the market.

Corals use a lot of 400nm to 480nm or even 500nm light. The just blue & white lights are almost always just one color of blue, say 440nm. A good full spectrum led will have 400nm UV, 420nm Violet, 440nm deep blue, 460nm blue, not to mention some 640nm to 660nm red which some corals also like. The white leds add a bit of everything, but they are really more for our eyes than they are for the coral... not completely, but a lot. Here is a chart of what the zoanthealia in the coral needs to do photosynthesis.

http://i395.photobucket.com/albums/pp37/RonReefman/colorspectrumgraphjpeg-1.jpg (http://s395.photobucket.com/user/RonReefman/media/colorspectrumgraphjpeg-1.jpg.html)