(Another) DIY LED Build - Linear Design

[txny13]

haveing trouble with amount

haveing trouble with amount

so going all led xp softys sps lps 150 gal 72x 18x27 i was told that 72 leds would be fine but cant come up with a configuration for them any help. thanks johnny

 

[Bugcrusher]

Sorry to interrupt this discussion but I have a question. I planned on 80 fedy leds with a large china PS 200-36 @ 5.2A, constant voltage. Original plan was for 8 strings of 10 but now I have one LED bad so 7 string of 10 and 1 string of 9..will this work still or am I flirting with disaster? Leds are 3.6 Fv and 700mA.

 

[TheFishMan65]

Row of RB, CW, RB, RB, CW, RB 12 per rail and lift it up so they can match?

 

[katchupoy]

60L x 24W x 18H

60L x 24W x 18H

60L x 24W x 18H

sorry for being late.

So here is my take. If you do rail... then you can start low and keep adding later till you hit what you like.

72 leds for me is the magic number. 60x24 = 1442/72 = 20

This is just a recommendation, you can go lower or higher. With this number, may I suggest 6 rails x 12 leds. Please see pic below.

 

[gatorsong]

Katchupoy
I have a 42x43x12 tank. Do I still need 90 LEDs "(42*43)/20"? I would think the 12 inch depth would allow me to get less LEDs with a bigger degree optic.

 

[TheFishMan65]

What do you want to keep?

 

[gatorsong]

I'm a beginner, and my brother is helping me out. Still getting all the terminology down.

Fish, Rocks, Bubble Tip, corals

 

[txny13]

??

??

katchopoy ;so would the setup that you did for reefer jax work for my 72l 18d 27 h confussed on lens and such

 

[kyocera]

What is everyone using to attach the leds the adhesive,grease and screws or the thermal glue pads?

 

[TheFishMan65]

Personal preference, but I like screws and nylon washers.

 

[chilly724]

I like screws and nylon washers also. Just like the idea of changing as led's get better.

 

[katchupoy]

Katchupoy
I have a 42x43x12 tank. Do I still need 90 LEDs "(42*43)/20"? I would think the 12 inch depth would allow me to get less LEDs with a bigger degree optic.

I know I am late already but will try to answer your question.

yes I believe being a depth of 12 inches plays a vital role on the intensity of the light. How much, I dont know. So we will be experimenting here...

Here is my 2 cents... in no way scientific or anything but just experiment i should say.
Below is a diagram of a LED mounted 9 inches off water level. Raising it will increase the diameter, lowering it will decrease it.

Its suppose to be 5 x12 LEDs but instead of 12, i made it 6 per rail... So you will have 10 x 6 = 60.
Row 1 (red) and row 3 (red) will be in the same circuit and so on...

A factor of 29. Maybe twice of 15 (for SPS) but since your height is also half of what normal tank have so maybe we can get away with 30???

 

[gatorsong]

Thanks for the info. I actually bought a 5'x5'x2' tank. so of course the design is different now. Looking at how you design the previous design. i think I got 12 rows of 7. I'm not sure if i should put 14 led on the meanwell driver, but the spec says the driver can handle 14 leds. Thats 84 leds. Looking at the products from rapid led. I should buy two 48 and make a 96 led setup.

 

[TheFishMan65]

You really don't want to use the ELN with that many LEDs. Look at the HLGs. RapidLED sometimes has them - they just can't keep them in stock.

 

[jdyer88]

You really don't want to use the ELN with that many LEDs. Look at the HLGs. RapidLED sometimes has them - they just can't keep them in stock.

are the HLGs dimmable, and how many leds can you run in a string (hlg 120h-48)?

 

[TheFishMan65]

I have not used the HLG, but IIRC the 185 is dimmable and run around 4.5 amps at 48 volts. So probably 5 string of 12-14 LEDs.

 

[disc1]

I finally made it to the end of the thread. I am just starting the planning stage to put LED's on my 75. Reading this has really helped me get my ideas together. I'm sure I'll read it again.

Thanks Katchupoy for sending me this way!!!!

 

[katchupoy]

Lets revive this thread... I promised all of you, a PAR reading of my RIG. And because 2hi4u2c lend me his PAR meter (big thanks to him), now I am happy to say that I have my final reading plus more... so stay tune!

 

[katchupoy]

I apologize I dont have pictures to back my reading... its hard to take PAR reading and at the same time take pictures.

50 (cool white only) 12 x XPG @ 1000 ma
70 (royal blue only) 12 x XRE @ 750 ma

120 (blue, white and blue) 12B + 12W + 12B

These readings were taken at the bottom glass of the tank... I have no sand. All pumps are off. If pumps are on... reading fluctuates from 90 to 120... Also these reading are with 36 LEDs.

 

[katchupoy]

Also I took the liberty of taking PAR reading of one LED bulb... i just want to make sure if my theory is right.... That the par reading will be linear.... meaning if you have 2 bulbs, then reading must be close to twice the reading of each.


Here is an example...

This diagram explains that a one LED XRE Royal Blue with 60 degree optics have a PAR reading of 112, 13 inches off the meter (air readings) and not under water....

I hope that the diagram is easy to understand...

112 is taken at the center.
54 is taken 3 inches off the center
and 10 is taken 9 inches off the center.
0 reading at 9 inches.