LED wall build 500W DIY

[karimwassef]

No. Going with a photon is a photon. I don't think spectrum is as impactful for non-SPS. My Xenia are growing under it like weeds... Going for raw PAR.

No tuning option.

 

[karimwassef]

Temps and cooling ?

It generates 500W in heat to the air around it, but the LED screen itself is about 115F.. so I can touch it without issue.

That's actually the same ratio as the Metal Halides, by the way

 

[oreo57]

For fun how about getting the Ohm value off the strips and calculate "power losses" used to heat the resistors..
suspect 15% loss in that alone..

0.71W/LED

Needs verification.. too high AFAICT..Not by much though.
hitting .5W per diode is even problematic..
.7 system watts per LED maybe..taking extremes of one sample

200mA peak at 3.4V peak is .68...resistors shedding 1.8V each.
considering most of these strips are designed to accept higher than "recommended" voltage building them too "peak" would not really be normal..
Maybe at 13V.
Mostly academic though..

Need to find constant current strips..yea I know.. not cheap.

OPP's forgot to add congrats on your patience..lots of wiring..and as always really fun stuff.

 

[karimwassef]

well.. there's 840 LEDs and it consumes 600W... 50A x 12V ... hence the 0.71W/LED "effectively"

A lot is probably burning off in the resistors.

 

[karimwassef]

ha ha ha constant current LED strips.. is there such a thing? didn't even look.

These are cheap because they're made for mass usage to run off cheap 12V constant voltage power supplies.

 

[oreo57]

http://www.houzz.com/photos/5745723...ight-White-contemporary-undercabinet-lighting

$200 for 16ft..

http://www.solidapollo.com/constant-current-led-strip/?gclid=CIeuyY-qzNICFVC4wAod_PsDMA

24V driver every 6 diodes..

alternate:
http://www.digikey.com/product-detail/en/bridgelux/BXEB-L0280Z-57E1000-C-A3/976-1496-ND/6236282

roughly $4/ft....
no heat sink required.
Needs driver .
150L/watt approx..
80CRI..

30X $4 would probably beat or exceed your panel..
plus drivers of course..

22 and 44" models..

 

[oreo57]

Sorry ran out of edit time..
soon your panels will exceed any MH..
Just got to get the cost down.

180 Lumens/Watt raw LED power and up to 150 Lumens/Watt system delivered!
Typical retrofit of one LED strip per two T5/T8/T12 fluorescent tubes.
Optimal thermal management and the longest life at 15W, 20W, 25W & 39W power.
48 LEDs per 2 feet & 96 LEDs per 4 feet for minimal or no pixelation effect.
Dim to OFF – Others Dim to 10%
External driver with built-in 12Vdc auxiliary power for easy sensor and wireless controls integration.
Tight, consistent color binning.

http://hilumzusa.com/difference/linear-led-retrofits/

sorry just makes me a bit warm and fuzzy..
http://hilumzusa.com/product/dm120/

 

[karimwassef]

Wow! Not a fit... but pretty

 

[perkint]

Yeah, the Bridgelux EB series are pretty good (spec wise and price wise) but not as cheap as the 12V strips. I picked some up from Digikey tail end of last year, but not used them yet. They are for the garage tho, not tank related.

When you took the readings, was that with the fans on or off? Be interested to know how much difference the heat levels make to the output.

Tim

 

[karimwassef]

I don't remember... I think it was with the fans on but I was only measuring the current draw into the LEDs. The fans are power hogs - they're 3A each alone.. so that's 6A x 12V ~ 70W into those screechers!

https://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00YOC80IO

They're 224CFM each, so they're blowing 450CFM on the wall's back.

 

[perkint]

Wow! That's one hefty powered fan!

Tim