Help with T5 bulbs

[Ratpack]

I have a 75g tank with 85% SPS. My lighting is a TEK 6x54. I have blue bulbs in 4 slots, all ATI and for the other two slots, I have choice of two coral plus from ATI or one coral plus and one purple plus. All bulbs are ATI.

 

[Doogle]

Coral plus is basically 60% aqua blue special, 30% blue plus, and 10% purple plus . It has a lot of pop on the red/orange colors like a purple bulb.
For max growth a ge6500, it will also make your green and yellows pop more.
It's up to you. Always good to have extra bulbs to play with, every eye is different. I feel like something is missing without a purple bulb. But you can probably get away without a purple bulb using coral pluses.

 

[ddelozier]

For growth, go whiter colors.. for pretty, purple will do better.

 

[dmatt88]

For growth, go whiter colors.. for pretty, purple will do better.

Oh contraire mo frere.

U see the article awhile back on the 420 spectrum and coral growth in coral magazine? Can't attest to purple but blue will get the dudes a growing.

..........rarely am I speechless

 

[ViperDoug]

What MAttD said....blues grow faster than whites. Studies show.

 

[Ratpack]

I actually have all the bulbs on hand. My issue is I have two coral plus and one purple plus, but only two open slots in the fixture. Wondering which two should go in.

 

[engineer goby]

Play with them and see what looks best to you, thats all that matters they will all grow coral

 

[Bearjohnson]

Play with them and see what looks best to you, thats all that matters they will all grow coral

+1

 

[Doogle]

What MAttD said....blues grow faster than whites. Studies show.

Right , that's why 20k (blue) halides grow slower than 10k (white) halides.
There's a lot more to it than just white and blue.
ATI blue plus are a creature all their own.
T5 bulbs and halides are totally different.

Purple bulbs have a lot of blue and red spectrum in them. Corals around 40-50 feet under water are still getting the red spectrum from the sun. It depends on the coral. Shallow water corals must get a lot of yellow/green and red spectrum with the blue don't you think? Full spectrum is very important. Notice how blue and cool white LEDs suck? They lack the needed red, green, cyan,yellow ( warm white ) spectrums that t5 are great at producing. Even uv light is important , halides are great for that.