Understanding DIY LED Light Spectrum *** EDITED THREAD***

2quills

2quills

Well-Known Member
Nice write up. Thanks for sharing. Still waiting for cree to produce a good violet chip in the 420nm range. Very true though when it comes to diy that most folks don't realize that there can be a huge difference in color/appearance from leds of the same type. Cutters is the only place that I know of that offers chips that you can actually order by specific bin code.
 
reefraff

reefraff

Active Member
I myself use a combination of Royal blue, Cool, neutral and warm white LED's. Blues are all XR-E and do fine but they are only a little over a year old. I tried some violet LED's and couldn't see where they did anything other than when I have the blue string they were in running only and then it didn't bring out any more pop, just subdued the light some. My dusk/dawn phase includes a step which is blues and warm whites, it looks cool, kinda like a sunset which I know isn't accurate but who cares LOL!
 
2quills

2quills

Well-Known Member
Quote:
Originally Posted by reefraff http:///t/388708/understanding-diy-led-light-spectrum#post_3429873
I myself use a combination of Royal blue, Cool, neutral and warm white LED's. Blues are all XR-E and do fine but they are only a little over a year old. I tried some violet LED's and couldn't see where they did anything other than when I have the blue string they were in running only and then it didn't bring out any more pop, just subdued the light some. My dusk/dawn phase includes a step which is blues and warm whites, it looks cool, kinda like a sunset which I know isn't accurate but who cares LOL!
As long as it works and you like it that's all that matters. I was kicking around the idea of u.v. but true 420nm leds are hard to come by. Usually you find them around the 390nm-410nm range. And usually they're cheap knock off leds...not so much for the color pop but just to round out the spectrum on the lower end of what is useful for zooxanthelae. And if you toss in a couple of 660nm reds then I figure you'd pretty much have the best of all worlds that leds have to offer. Cree has a new royal blue led out now called the XT-E. They're more efficient than XP-E and they're supposedly a lot easier to produce in terms of color with better tolerance and easier to bin. They'er also cheaper than XP-E and XR-E. Haven't seen anyone using them just yet but cutters is selling them.
 
reefraff

reefraff

Active Member
Quote:
Originally Posted by 2Quills http:///t/388708/understanding-diy-led-light-spectrum#post_3429908
As long as it works and you like it that's all that matters. I was kicking around the idea of u.v. but true 420nm leds are hard to come by. Usually you find them around the 390nm-410nm range. And usually they're cheap knock off leds...not so much for the color pop but just to round out the spectrum on the lower end of what is useful for zooxanthelae. And if you toss in a couple of 660nm reds then I figure you'd pretty much have the best of all worlds that leds have to offer. Cree has a new royal blue led out now called the XT-E. They're more efficient than XP-E and they're supposedly a lot easier to produce in terms of color with better tolerance and easier to bin. They'er also cheaper than XP-E and XR-E. Haven't seen anyone using them just yet but cutters is selling them.
I had the Violet leds in 2 different strings and two of them blew withing a few days of each other so I pulled them all. Rest of my stuff has been working fine for a year now, those didn't make it two months so I'd hold out for crees. I got the violets and Nano Tuners. At this point I want to pull a few cool whites for some neutrals cause I am jonesing for a little more yellow but I am really close.
 
acrylic51

acrylic51

Active Member
We're the FV's the same for all the LEDs in the same string? If not that could factor into their short life.
 
michaeltx

michaeltx

Moderator
The original poster took what he posted directly from another site and posted it here. You guys were having a discussion on this subject and I did not want to out right delete your posts so I moved them into this one so that you could continue the discussion.
Mike
 
flashmanblack

flashmanblack

New Member
Quote:
Originally Posted by 2Quills http:///t/388819/understanding-diy-led-light-spectrum-edited-thread#post_3429830
Nice write up. Thanks for sharing. Still waiting for cree to produce a good violet chip in the 420nm range. Very true though when it comes to diy that most folks don't realize that there can be a huge difference in color/appearance from leds of the same type. Cutters is the only place that I know of that offers chips that you can actually order by specific bin code.
very useful thread for led lighting indeed
 
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