The far red thread

[welight]

cost or other feature comparison vs. the tri-led boards already discussed?

The difference in price is negligible, I imagined this might appeal as they are linear in nature, like our 6 up linear, that people commented they like, depends a bit what beam you want, just a round beam or elliptical?
Cheers
Mark

 

[welight]

These?
http://www.rapidled.com/solderless-semileds-730nm-far-red-led/ (Minimum Luminous Flux 360mW @700mA)

Wouldnt i need about 8-10 of the them for my space?

Are the 3W versions you suggested available solderless?

We considered this approach to solderless when we designed our board but the only issue is your tied into the harness and the lengths they come in to join up stars where as poke in wire solderless makes it simpler to just cut wire to size and join them up
Cheers
Mark

 

[Airwalker16]

I'm just going to follow growmau5's video with the exception of spreading the 3 over a 36" Sq tube, AND using the 1000ma series driver rather than the 700 he uses. It's simple, looks awesome, and I can follow it quite easily with the video.
I think all of us are putting too much time and over thinking the whole thing. Let's all keep it simple and just follow his vid, spacing our led to our specific needs.

 

[grouch]

I'm just going to follow growmau5's video with the exception of spreading the 3 over a 36" Sq tube, AND using the 1000ma series driver rather than the 700 he uses. It's simple, looks awesome, and I can follow it quite easily with the video.
I think all of us are putting too much time and over thinking the whole thing. Let's all keep it simple and just follow his vid, spacing our led to our specific needs.

There is no reason we should all just follow his video. If it works for you that's great but there are many ways to get it done.

 

[testiclees]

http://www.rapidled.com/solderless-cree-xp-e-far-red-led/

I use 4 on a 3 foot bar over a 5' x 2.5' space. two bars in a 5x5 tent. Meanwell apc driver on its own timer.

On that link It states:

• Min. radiant flux 210mW @ 350mA

So what is the total wattage of your single 3 ft bar?

 

[PurpleBuz]

On that link It states:

• Min. radiant flux 210mW @ 350mA

So what is the total wattage of your single 3 ft bar?

From the rapidled web page:
"2.5V forward voltage max (important when calcuating number of LEDs per driver)"

I am using a meanwell APC-12-700. From the apc datasheet: "9 to 18V" at 700 ma.

2.5 X 0.7 = 1.75 watts per led
4 leds per bar X 1.75 = ~7 watts.

 

[BOBBY_G]

far reds top out at 2.25V not 2.5. look at the datasheet

at 0.7A they are ~1.47W

 

[Airwalker16]

So on growmau5 video, he uses a 12v to run those 3 semileds. He told me though that it can do 4 & that the 24v he has can run 8. So if I did 3 bars of 3, what would I need to power them all on one plug? And if I used the LDD-1000 would it change anything?

 

[PurpleBuz]

far reds top out at 2.25V not 2.5. look at the datasheet

at 0.7A they are ~1.47W

picky picky picky. yes your right.
But when estimating Vf to max out a driver its a good idea to allow a small buffer area since they can vary and at cold start it can be peak higher.

 

[guod]

far reds top out at 2.25V not 2.5. look at the datasheet

at 0.7A they are ~1.47W

Typically you are a smart guy, but sometimes ...
...look at the datasheet and it can be higher for 700mA

 

[BOBBY_G]

thats strange they only list a max for the nominal current. thats quite a large range!

 

[littlejacob]

From the rapidled web page:
"2.5V forward voltage max (important when calcuating number of LEDs per driver)"

I am using a meanwell APC-12-700. From the apc datasheet: "9 to 18V" at 700 ma.

2.5 X 0.7 = 1.75 watts per led
4 leds per bar X 1.75 = ~7 watts.

Bonjour
So from your experience do you think 6 x 3w 730nm in a 4x4 would be enough? (Individual led spread equally!)
I need 2x 6 fr...For my gboxes...and maybe only 1 driver for both!
CU

 

[PurpleBuz]

Bonjour
So from your experience do you think 6 x 3w 730nm in a 4x4 would be enough? (Individual led spread equally!)
I need 2x 6 fr...For my gboxes...and maybe only 1 driver for both!
CU

6 maybe I 'd go with 8. 4 per bar, two bars, one driver per bar.

 

[testiclees]

From the rapidled web page:
"2.5V forward voltage max (important when calcuating number of LEDs per driver)"

I am using a meanwell APC-12-700. From the apc datasheet: "9 to 18V" at 700 ma.

2.5 X 0.7 = 1.75 watts per led
4 leds per bar X 1.75 = ~7 watts.

Sorry to be pesty PB. Which 3' bar did you use, please?

 

[littlejacob]

I guess any thick aluminum square bar will do the trick...no?

 

[littlejacob]

But I plan to have one on single small "hs" spread in the tent...that's why I thought 6!
I split the 4x4 in 6 and put 1 fr over each area...
If you always say 8 I will go with 9 to do 3/3/3...

 

[testiclees]

I guess any thick aluminum square bar will do the trick...no?

I was looking for the measurements for XPEFAR-L1-0000-00601-SL....thats the solderless cree far red. I wanted to know if i could put 5 or 6 on 30" of heatsink usa 2" profile passive.

 

[Airwalker16]

I was looking for the measurements for XPEFAR-L1-0000-00601-SL....thats the solderless cree far red. I wanted to know if i could put 5 or 6 on 30" of heatsink usa 2" profile passive.

Absolutely you can. Growmau5 puts his on a 1 1/4" square bar from Stevesleds which I'll be replicating. Aside from mine being 36" when I do make it, he uses like 6-8" bars with 3 on each as will i, just much more spaced out. These little leds don't get hot.. and even if they did, these should only be on 5-15 min's after lights out anyways.

 

[PurpleBuz]

Sorry to be pesty PB. Which 3' bar did you use, please?

a variety

What I actually build are "flowering bars" with two independent timer channels.

One timer channel is full of Deep Red monos + UVA+actinic blues.
The second timer channel holds just the far reds for dusk\dawn Pfr.

The bar is similar to the heatsinkusa 1.813 profile.

By themselves the far red monos could use a variety of 1/16" aluminum angles, square tubes, channels, tbars.or flats. It really doesn't take much.

 

[littlejacob]

Bonjour
So if I take 9 cree far red @1000mA they are 2.25V...so a 20.25V 1000mA driver!?
Maybe if I plug the 18 from the 2 boxes together it will be cheaper to purchase 1 x 40.5V 1000mA driver?
CU