Opinion on LED color

[bobi1x1]

I need opinion on following combination of leds:

 

2 x 450nm royal blue Osram square

1 x 485nm blue Cree XP-E

1 x cyan Luxeon Rebel

1 x lime Luxeon Rebel

1 x 2700k white Luxeon Rebel

 

All diodes are on very small star and I want to use only one star on very small pico aquarium.

 

I read led color guide and see that warm white should not be used as only white because purple tint.

It is also stated that cyan and blue help reduce that purple hue, will in case of this star light be purple

or what should I expect?

 

Is lime led white?

 

I am not concerned about light intensity I have only soft corals and few low light LPS, but I would like

to have nice color. If you think that color would be issue with this star please say.

 

Thanks

[Clown79]

Blues and violets bring out colours. Most ppl choose lighting with a 3:1 ration blue to white.

 

I don't have any lime or cyan in my fixture so I can't offer specifics on it.

 

Theres a thread on led colours and what they do/importance of them. Check it out. Its got alot of info.

[evilc66]

I need opinion on following combination of leds:

 

2 x 450nm royal blue Osram square

1 x 485nm blue Cree XP-E

1 x cyan Luxeon Rebel

1 x lime Luxeon Rebel

1 x 2700k white Luxeon Rebel

 

All diodes are on very small star and I want to use only one star on very small pico aquarium.

 

I read led color guide and see that warm white should not be used as only white because purple tint.

It is also stated that cyan and blue help reduce that purple hue, will in case of this star light be purple

or what should I expect?

 

Is lime led white?

 

I am not concerned about light intensity I have only soft corals and few low light LPS, but I would like

to have nice color. If you think that color would be issue with this star please say.

 

Thanks

Are you planning on being able to control the different colors? If so, then you should be able to tweak things to get good overall color with the warm white. You are right though about the warm white. By itself, it's going to create a purple hue when used with the royals. Lime and cyan will help with this, but it might be tricky getting a decent balance without being able to adjust the colors to suit. If you want to make your life easier, just go with a good high CRI 4500K neutral white. They will be easier to get right without a lot of tweaking.

 

If you aren't planning on having adjustable color, then you may want to simplify things a little, and maybe start with a good baseline setup and add LEDs as the need arises. A good basic setup would be something like this:

 

1x 4500K neutral white (80 CRI or better)

2x royal blue

1x blue (470-480nm)

1x violet (420-430nm)

1x cyan (490nm)

 

That should give you a fairly well rounded light that will a little heavy on the blue side, but with decent overall color rendering. If there is too much of a purple tint, add a lime. If it looks a little too green, replace the cyan with the lime.

 

BTW, lime is made in a similar way to white LEDs. It uses a phosphor over a royal blue die, but has less red phosphor making the light more yellow-green. These do wonders for making the light brighter to the eye without giving the tank a green cast.

[bobi1x1]

Thanks Clown79 and evilc66

 

 

Are you planning on being able to control the different colors? If so, then you should be able to tweak things to get good overall color with the warm white. You are right though about the warm white. By itself, it's going to create a purple hue when used with the royals. Lime and cyan will help with this, but it might be tricky getting a decent balance without being able to adjust the colors to suit. If you want to make your life easier, just go with a good high CRI 4500K neutral white. They will be easier to get right without a lot of tweaking.

 

If you aren't planning on having adjustable color, then you may want to simplify things a little, and maybe start with a good baseline setup and add LEDs as the need arises. A good basic setup would be something like this:

 

1x 4500K neutral white (80 CRI or better)

2x royal blue

1x blue (470-480nm)

1x violet (420-430nm)

1x cyan (490nm)

 

That should give you a fairly well rounded light that will a little heavy on the blue side, but with decent overall color rendering. If there is too much of a purple tint, add a lime. If it looks a little too green, replace the cyan with the lime.

 

BTW, lime is made in a similar way to white LEDs. It uses a phosphor over a royal blue die, but has less red phosphor making the light more yellow-green. These do wonders for making the light brighter to the eye without giving the tank a green cast.

 

I wont have individual control. Two channels one royal blue + blue and everything else on other.

Star does have separated connections for white, lime and cyan. Is there way to make fixed ratio

between them?

 

I can get friend to replace diodes on star, just to check does every Luxeon rebel fit on same pads? Is it possible to

replace for example warm white with neutral white?

 

1. Replace warm white with neutral white.

2. If its too green replace cyan with extra royal blue

[evilc66]

A Rebel is a Rebel is a Rebel. All the same pad arrangement and size.

[bobi1x1]

A Rebel is a Rebel is a Rebel. All the same pad arrangement and size.

 

Thanks evilc66

 

Star in question is blueAcro AcroStar "Six". I think I pick one and experiment.

Really like how small star is and how closely diodes are packed.

[bobi1x1]

I have decided to add 3rd channel.

New configuration would be:

Channel1: 2xRoyal blue, Blue (can't change this)

Channel2: Neutral white

Channel3: Lime, Cyan

or

Channel2: Neutral white, Lime

Channel3: Cyan

Which of this two makes more sense?

[evilc66]

First option. You can always change it later if it doesn't work out as expected.

[bobi1x1]

Thanks evilc66

 

I am planning alternate combination just in case if I don't pick this single AcroStar I will go

with Steves LEDs 3 x 3up stars, all diodes are Rebel ES except violet which is SemiLED.

 

1x4500K neutral white

2x Royal blue

1x blue

1x hyper violet (415-425, there is no 420-430 option on 3up star)

1x cyan

 

1x lime

 

I will take all diodes previously recommended and lime and there are two more slots.

I am thinking about extra royal blue and warm white or extra neutral white.

 

Channel1: 2x Royal blue + 1extra

Channel2: Neutral white + violet + 1extra

Channel3: Blue, Cyan, Lime

 

What would you suggest for last two slots?

Do you think it would be better to use cool white plus warm white ?

 

Thanks for help

[evilc66]

Honestly, I would change it up quite a bit

 

Ch1: 2x Royal, 1x Violet

Ch2: Neutral white, blue

Ch3: Cyan, Lime

 

Adding anything else in there in terms of different colors will be tricky. Warm white is great for adding warmth and improved color rendering, but it's not an easy LED to combine with others. You may be able to get away with putting it with the neutral white. Don't go with cool white. It has terrible color rendering and mandates a warm white to compensate.