The Planted Tank Forum - Reply to Topic
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > Lighting > LED = washed out color?

Thread: LED = washed out color? Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
03-02-2013 03:08 PM
TexasCichlid
Quote:
Originally Posted by Mumford View Post
Anyone know of a video showing of a finnex light?


- Mumford
03-02-2013 01:53 PM
Steve001
Quote:
Originally Posted by TexasCichlid View Post
I will take better looking colors than absolutely accurate representation any day of the week.


Sent from my iPad using Tapatalk HD
But you get better looking colors if you have a light source that produces color that are reflected instead of absorbed. For example in a tank you have Rotala Micranthemum that looks like this Notice not only do you see a shade of red but there's also a bit of orange and perhaps yellow. If you don't have those colors in the light source those colors in the plant won't be reflected and the plant won't be visually at it's best. That's the reason under an led light at 6500 K produces washed reddish-red plant colors whereas greens being closer to the predominant blue output look pretty good.

BTW, You could incorporate an led that emits at 405nm and possibly get some flourescence. You check this easily with a violet laser pointer. Green plants generally fluoresce magenta.
03-02-2013 04:34 AM
Mumford
LED = washed out color?

Anyone know of a video showing of a finnex light?


- Mumford
03-02-2013 04:20 AM
veryzer
Quote:
Originally Posted by TexasCichlid View Post
I will take better looking colors than absolutely accurate representation any day of the week.


Sent from my iPad using Tapatalk HD
Agreed!
03-02-2013 03:39 AM
TexasCichlid
LED = washed out color?

I will take better looking colors than absolutely accurate representation any day of the week.


Sent from my iPad using Tapatalk HD
03-02-2013 03:18 AM
DarkCobra
Quote:
Originally Posted by Steve001 View Post
A 97 CRI at what color temperature ?
I looked it back up, I was in error. Philips TL950, 5000K 98CRI. I didn't mind the extra yellow, it just didn't make anything "pop". I currently have some 6500K 90CRI bulbs in one tank, it looks pretty good. But it's still nothing like the DD Giesemann combo, which makes colors "pop" like nothing else I've seen.

Quote:
Originally Posted by Steve001 View Post
Don't poo poo an idea because you think it's silly when in fact it's being done with success.
I'm sorry if you can't distinguish between my personal preference to accentuate certain colors over perfect realism, and "poo pooing" your idea.
03-02-2013 02:50 AM
papwalker @Steve001
I like the idea of multiple LEDs. You could easily imagine a control unit that lets you alter the spectral mix. Like knobs to adjust the CYM or RGB if you will. A small microprocessor and you can simulate the changing colour gamut of the day. With the rate of technical progress on LEDs I guess it wont be long before we start seeing this type of fitting.
It would be way cool.
03-02-2013 02:29 AM
Steve001
Quote:
Originally Posted by DarkCobra View Post
Yeah, but that is a lot of different colored LEDs, LOL! Would be a very expensive and hard to build fixture.

Plus note that high CRI isn't necessarily good. I did try some 97CRI fluorescents that everyone raved about on photography forums once. And I was completely unimpressed, even after a month to let my eyes and the plants adapt. Even common low CRI 6,500K bulbs looked better.

So I save the high CRI bulbs for photography and Stef's art area. And use bulbs in tanks that look best to me, even if they exaggerate colors and have horrible CRI.
A 97 CRI at what color temperature ?

I have a CFL rated at a CRI of 93 and K temp of 5500 and it looks fine. I've seen florescent bulbs rated as high as 98 but the catch is they are either a very high K temp or low. That's because it's much easier to match sunlight at either the end of the day or near the beginning. Don't poo poo an idea because you think it's silly when in fact it's being done with success.

If you are not a diy'er then it would be hard. On the other hand... it wouldn't.

Leds are expensive that a fact.
03-01-2013 09:54 PM
DarkCobra
Quote:
Originally Posted by Steve001 View Post
Look through this thread http://www.plantedtank.net/forums/sh...d.php?t=198196 it will address all of the concerns you have. also look at the links within the thread. with leds you can do even better than a T5.
Yeah, but that is a lot of different colored LEDs, LOL! Would be a very expensive and hard to build fixture.

Plus note that high CRI isn't necessarily good. I did try some 97CRI fluorescents that everyone raved about on photography forums once. And I was completely unimpressed, even after a month to let my eyes and the plants adapt. Even common low CRI 6,500K bulbs looked better.

So I save the high CRI bulbs for photography and Stef's art area. And use bulbs in tanks that look best to me, even if they exaggerate colors and have horrible CRI.
03-01-2013 12:18 PM
Steve001
Quote:
Originally Posted by DarkCobra View Post
White LEDs are just a blue LED, with typically a single phosphor that converts some of the blue to other colors. All their spectral distributions look similar to this:



There is a single sharp peak for blue, since that's the true LED color shining through, but the phosphor emission is smooth. So there's little color enhancement, especially for reds, which are particularly weak. You can move to a lower K rating and get more red, but then you get more yellow too, and that doesn't make anything look good.

On the other hand, T5's can use multiple phosphors, and be engineered for any number of color-enhancing peaks, like the infamous DD Giesemann Midday:



This is one of the major reasons I built a dimmable T5HO fixture for my largest and showiest tank, instead of LEDs. I really wanted to bring out the colors, and I don't think LEDs can do that without some trial and error, which would be expensive on a fixture this size. Eventually I'll play with LEDs on smaller tanks. I expect to come really close to a good T5, it'll take some red LEDs mixed in with the white, maybe some other colors too, and possibly some diffusion to avoid multicolored shadows.
Look through this thread http://www.plantedtank.net/forums/sh...d.php?t=198196 it will address all of the concerns you have. also look at the links within the thread. with leds you can do even better than a T5.
03-01-2013 12:10 PM
Steve001
Quote:
Originally Posted by BriDroid View Post
I'm happy with my Ray2. I think the colors look great.

My only issue with it is some red plants struggle to turn red under it. They grow well with the PAR, they just don't turn the color that they do under T5HO or MH.

I have a single Ray2 over my 72 and I get great growth.

My understanding is some plants turn red as a protective measure against too much light.
03-01-2013 03:31 AM
veryzer I've run cfls with a gieseman-type pink plant bulb mixed with a daylight bulb. I find daylight colors from any single daylight source a "washout." So I switched one of my lights to a buildmyled planted tank spectrum. They devote space to blue and red leds and I find that it looks really good...absolutely no washout of reds, etc. Their fixtures are way more expensive than finnex but the result to my eye is certainly worthwhile. For me, that's the led solution if you want warm color-popping light without compromises. YMMV.
03-01-2013 01:48 AM
DarkCobra White LEDs are just a blue LED, with typically a single phosphor that converts some of the blue to other colors. All their spectral distributions look similar to this:



There is a single sharp peak for blue, since that's the true LED color shining through, but the phosphor emission is smooth. So there's little color enhancement, especially for reds, which are particularly weak. You can move to a lower K rating and get more red, but then you get more yellow too, and that doesn't make anything look good.

On the other hand, T5's can use multiple phosphors, and be engineered for any number of color-enhancing peaks, like the infamous DD Giesemann Midday:



This is one of the major reasons I built a dimmable T5HO fixture for my largest and showiest tank, instead of LEDs. I really wanted to bring out the colors, and I don't think LEDs can do that without some trial and error, which would be expensive on a fixture this size. Eventually I'll play with LEDs on smaller tanks. I expect to come really close to a good T5, it'll take some red LEDs mixed in with the white, maybe some other colors too, and possibly some diffusion to avoid multicolored shadows.
03-01-2013 01:21 AM
Mumford
LED = washed out color?

Quote:
Originally Posted by BriDroid View Post
I'm happy with my Ray2. I think the colors look great.

My only issue with it is some red plants struggle to turn red under it. They grow well with the PAR, they just don't turn the color that they do under T5HO or MH.

I have a single Ray2 over my 72 and I get great growth.
Will dosing extra iron not help?


- Mumford
03-01-2013 01:05 AM
BriDroid I'm happy with my Ray2. I think the colors look great.

My only issue with it is some red plants struggle to turn red under it. They grow well with the PAR, they just don't turn the color that they do under T5HO or MH.

I have a single Ray2 over my 72 and I get great growth.
This thread has more than 15 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT. The time now is 08:22 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012