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Chinese LED swapout
#1
The end of last year I picked up a set of barely used black box LEDs (Timelight Tunnel brand).

I paired them with 4xT5s a combo of 2xblue+, 1x Actinic, and 1xpurple

After some experimentation of settings I settled on a blues@100% whites@30%

The whites I found really yellow and at 100% of both channels the color was terrible.
[Image: bd657b73e5bc0d8f8dae46f511194f40.jpg]

The reading above is 12" through air, as you can see from the spectrum theres a lot of wasted light. So I decided to adjust both channels, the idea being to bring the 100% max output more inline with the spectrum of an old radium Halide.
[Image: 99399021cdab10da6023fad0a10ce6f8.jpg]

I started with ordering some replacement LEDs, 395nm, 420nm, 440nm and some more 460nm.

I started with some readings from each individual Led with the meter butted up against each lens, with the exception of the greens and reds which I run without lenses.
Below is a sample of those readings, can't post them all as Tapatalk won't let me.
[Image: cf07a5f52cf92b0ffa9d10e12ef97314.jpg][Image: ab72d39744247c65e0e41e6d83e2cd45.jpg][Image: 6fca02cb14a9c9b0f1c9b1ef0f35976a.jpg][Image: 6c03866d4f0650b2d5825d4dc7af0dbb.jpg][Image: 93c24307e9b0888d61a0e770779c378e.jpg]


Using these I created a rough spectrum output for each led in excel. Then then graphed the result for the total output for a very rough spectrum of the whole fixture.
[Image: bd88ac37bba40ad18dffa5acb6ef8b75.jpg]

Then trialed different LED combinations using the calculations to produce a spectrum that closely matches the radium.
[Image: daf61bb8d2284c0241c9e8a9514607c0.jpg]

I decided to start with replacing about 50% of what I wanted to do, mainly for in the 440s, pull out the yellows and add in the some of the 420s and 395s.
After getting them in and refitted to the tank I measured the new output.
[Image: 045e814c2c8b04ff8fa6d2a8a750fc48.jpg]

It's a big improvement color wise now looking at the tank with the lights at 100% it's over 10k maybe around 15k. I dialed in the lights to the original par before the swap and will be adjusting over the next few weeks before going back and finishing swapping out the others I want to do.


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[-] The following 1 user Likes Daveuk's post:
  • Greenough
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#2
How much are the replacement Led's?
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#3
(02-Mar-2019, 10:01 PM)Greenough Wrote: How much are the replacement Led's?

The ones I picked up were off Ebay, 3.99 for 10 shipped.
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#4
Worth it then, didn't know they were that cheap.
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#5
I bought a wills light 165 watt with 2 channels were should they be properly set ?
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#6
I'm not familiar with that make but assuming:
A) The drivers are the same as Mars (drivers are typically not 165w they are less)
B) Led as roughly the same as the old Mars (haven't ever tested the new)

Then at 12" above water and blues set to 60% whites at 30% you will be at around 200 par at 8" water depth directly below. I personally prefer a higher height with these as the stock lenses mean you get a steep drop soon as you move away from directly below. Though you can pull a few lenses to help as well.

Depending on your original lights that is probably a good starting point as it's not too bright then adjust from there.

The most important thing is not to fry everything, what did you replace?

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#7
(11-Jun-2019, 09:38 PM)Daveuk Wrote: I'm not familiar with that make but assuming:
A) The drivers are the same as Mars (drivers are typically not 165w they are less)
B) Led as roughly the same as the old Mars (haven't ever tested the new)

Then at 12" above water and blues set to 60% whites at 30% you will be at around 200 par at 8" water depth directly below. I personally prefer a higher height with these as the stock lenses mean you get a steep drop soon as you move away from directly below. Though you can pull a few lenses to help as well.

Depending on your original lights that is probably a good starting point as it's not too bright then adjust from there.

The most important thing is not to fry everything, what did you replace?

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Thanks for the response, that answered my question
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#8
(11-Jun-2019, 07:41 PM)nisenor69 Wrote: I bought a wills light 165 watt with 2 channels were should they be properly set ?
Do you know if the Wills light uses the 0-10v dimmers? I'd like to hook them up to my Apex like many have with the Mars Aqua and RB's.
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#9
Idk if you seen my post before I did the same thing with my whites in the mars aqua and upgraded the whites to 20,000k whites and what a difference it makes looks and will grow way better.


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#10
(17-Jul-2019, 08:29 PM)Ryan1137 Wrote: Idk if you seen my post before I did the same thing with my whites in the mars aqua and upgraded the whites to 20,000k whites and what a difference it makes looks and will grow way better.


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I think my plan now is the mars aqua. I made my own led layout to mimic the SB reef lights. Switched out most of the warm whites. Wiring looks pretty easy to add the cat5e connector for the Apex too.[Image: cbaeeb41d2679e719240b20c53465907.jpg]
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