samsung hard strips

caretak3r

caretak3r

Well-Known Member
I bought a couple of these:
http://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8T342560WW/1510-1324-ND/5875178

I have a number of different generic no-name 5630 flexible 5m strips, and these latest samsung hard strips are as much as 6 times brighter. HUGE difference between legit lm561b and generic taiwan/chinese 5630s. These would be a perfect solution for a height limited micro grow in something like a rubbermaid tote or a DIY sun cloak type system. I'm going to use some thermal adhesive and 'glue' them to an aluminum baking sheet with a fan blowing on top (hans led style). I believe it'll provide adequate cooling.
 
robincnn

robincnn

Well-Known Member
I have the old 135 lm/W version.
https://www.rollitup.org/t/micro-greenhouse-with-luxeon-xf-3535l-led-strips.875345/#post-11918038

Your new one is 144 lm/W. Looks like the new version will give a close fight to 3x Vero 13's @350ma
https://www.rollitup.org/t/how-to-plot-ppf-chart-with-quantum-sensors-for-led-light-comparison.881113/#post-11844367

I see Vf went up from 24.7V to 24.8V
Can be underpowered sightly with a standard 24V power supply. my standard 24V power supply runs them at a little less than an amp.
these runs cool when at 700ma or under

upload_2016-5-9_21-58-34.png

Makes good light saber too
upload_2016-5-9_21-58-47.png

Makes an expensive but great solution to side light, mood light and under canopy light
upload_2016-5-9_21-59-5.png
 
caretak3r

caretak3r

Well-Known Member
It's expensive when compared to the best deals available in COB-world, but COBs aren't best in all situations (close quarters). At quantity of 100+ they drop from $20 to $12 per strip so if someone was building something out larger scale it would get a bit more attractive.

Tell me about running them on a CV power supply -- I always thought that was a bad idea for LEDs from what I'd read. Right now I'm using a random 12V ac/dc and a dc-dc step-up buck.

I'd bet that these would perform pretty well in your mini-cab grow challenge even if used exclusively (maybe one 56cm/22" strip in each corner vertically). I'm ordering some osram SSL 150 660nm LEDs to supplement my 4000K hard strips and will see how these perform in a tote. If I have time I'll run them against some Astir-like panels I made using SDS's 8-ball config (1:1:1 ratio of CW:WW:640nm 3W LEDs under-driven @ 300ma). I have more lights then time/space to test :)
 
robincnn

robincnn

Well-Known Member
With Constant voltage driver one of the advantages is that I keep driver AC power on and plug/unplug dc side of power to strip without risk of damaging led. Cannot do the same with Constant current power supplies. With Constant current power supplies need to make sure the led is wired before the driver power is turned on.
Constant current power supplies are better for led. There are strips that are rated 12v or 18v or 24v and it is easy to find Constant voltage driver for these. I see a lot of strips rated 12.7 or 24.x volts. The Constant voltage driver's may be off by a bit so they can slightly under/over drive the strip, which may not be bad.
The Samsung strip i used was rated 24.7V 1.35A. My 24v rated driver gives about 24.3v, which is enough to power it a little under 1A. If i use another 24v driver then i would be running the strip at a different current depending on what voltage the driver puts out. So with Constant voltage driver I have less control over how much current I will be running the strip at.

dc-dc step-up buck or LDD dc-dc step-down are good for getting CC from a CV. what dc-dc step-up buck are you using
upload_2016-5-15_0-10-0.png
I like the idea of SSL 150 660nm + 4000K strips.
 
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caretak3r

caretak3r

Well-Known Member
robincnn said:
With Constant voltage driver one of the advantages is that I keep driver AC power on and plug/unplug dc side of power to strip without risk of damaging led. Cannot do the same with Constant current power supplies. With Constant current power supplies need to make sure the led is wired before the driver power is turned on.
Constant current power supplies are better for led. There are strips that are rated 12v or 18v or 24v and it is easy to find Constant voltage driver for these. I see a lot of strips rated 12.7 or 24.x volts. The Constant voltage driver's may be off by a bit so they can slightly under/over drive the strip, which may not be bad.
The Samsung strip i used was rated 24.7V 1.35A. My 24v rated driver gives about 24.3v, which is enough to power it a little under 1A. If i use another 24v driver then i would be running the strip at a different current depending on what voltage the driver puts out. So with Constant voltage driver I have less control over how much current I will be running the strip at.

dc-dc step-up buck or LDD dc-dc step-down are good for getting CC from a CV. what dc-dc step-up buck are you using
View attachment 3681994
I like the idea of SSL 150 660nm + 4000K strips.
Click to expand...
I've just gotten in my head that CV is bad for LED. The 12V strips usually have resistors in place to limit current to keep thermal runaway from being a problem. My knowledge here is limited so I need to read more, but I've always stuck with CC unless there are resistors present.

I'm looking forward to testing 4K + ssl 150 660nm. my target environment has limited height, thus the choice of 150s over 80s. They should be in route to me now.

BTW, your older version of the strips are availabe @ arrow for $14... not a bad deal IMO.
 
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caretak3r

caretak3r

Well-Known Member
verical shipping pricing same as arrow - I tested with m zip and only $4 for 3 strips. I'm almost certainly going to buy more.
 
caretak3r

caretak3r

Well-Known Member
More options available and fantastic price points -- these are using the LM301A (3030 smd) instead of LM561B (5630 smd).

influx L09, 48V 1380ma 66W, 130-140 lm/W @Test current depending on CCT, $17.17 minimum order of 2 from verical
https://www.verical.com/s/7n90l1ww/

influx S02, 12V 1380ma, 16W, 130-140 lm/W @Test current dependng on CCT, $4.88 minimum order of 6 from verical
https://www.verical.com/s/n40l1ww/

There are other form factors, but not all are carried and some only have 1 CCT available
 
caretak3r

caretak3r

Well-Known Member
MrTwist1 said:
What are you guys using for heatsinks for these? Cheers
Click to expand...
based on feedback from the nextlight mini 150W, I'm going to mount some to an aluminum baking sheet and see how they fair. I expect I'll need a light breeze over the top, but that remains to be seen. Somehow, the nextlight appears to only use a PCB (not sure if it's aluminum or copper) and no fan, and they stay cool (18x22 fixture, 400 LM561Bs running at roughly 120ma each from my calculations).
 
caretak3r

caretak3r

Well-Known Member
OneHitDone

OneHitDone

Well-Known Member
caretak3r said:
@Chronikool,

If you want to build your own nextlight mini 150 type light, check out the pricing above and pair it with one of these:
http://www.bgmicro.com/hlg-185h-48a-led-series-power-supply-48v-3-9a-constant-current-high-efficiency-by-meanwell.aspx
meanwell hlg-185h-48a for only $23.

let's say you grab 4X the influx l09s @ 17.17 that's only $68, plus $4 shipping. Add the Driver and you're at roughly $100 for lights and drivers. Sounds much more appealing than $600 for a mini :)
Click to expand...
What are you using for passive cooling on these strips?
 
caretak3r

caretak3r

Well-Known Member
OneHitDone said:
What are you using for passive cooling on these strips?
Click to expand...
Still working that out. In the next few days I'm going to screw in 2 of the 33W strips (the initial ones linked in this tread) on an aluminum baking sheet and do some temperature testing. I expect it'll be OK with a slight breeze but I don't know for sure.

See Robin's post above - I believe he uses 2" from heatsinkusa
 
Chronikool

Chronikool

Well-Known Member
caretak3r said:
@Chronikool,

If you want to build your own nextlight mini 150 type light, check out the pricing above and pair it with one of these:
http://www.bgmicro.com/hlg-185h-48a-led-series-power-supply-48v-3-9a-constant-current-high-efficiency-by-meanwell.aspx
meanwell hlg-185h-48a for only $23.

let's say you grab 4X the influx l09s @ 17.17 that's only $68, plus $4 shipping. Add the Driver and you're at roughly $100 for lights and drivers. Sounds much more appealing than $600 for a mini :)
Click to expand...
Hmmmmm...link wouldnt work for me...but im intrigued for sure... :)
 
MrTwist1

MrTwist1

Well-Known Member
caretak3r said:
@Chronikool,

If you want to build your own nextlight mini 150 type light, check out the pricing above and pair it with one of these:
http://www.bgmicro.com/hlg-185h-48a-led-series-power-supply-48v-3-9a-constant-current-high-efficiency-by-meanwell.aspx
meanwell hlg-185h-48a for only $23.

let's say you grab 4X the influx l09s @ 17.17 that's only $68, plus $4 shipping. Add the Driver and you're at roughly $100 for lights and drivers. Sounds much more appealing than $600 for a mini :)
Click to expand...
Are you sure that's the right driver? That one says constant current 3.9A...
 
caretak3r

caretak3r

Well-Known Member
MrTwist1 said:
Are you sure that's the right driver? That one says constant current 3.9A...
Click to expand...
there are many times you can make a driver work with some thought. In this case, the driver is 1/3 the price of normal, so I'm willing to put in the extra thought. You are right about current, but it is also adjustable via internal potentiometer down to 2A if needed. In my post, I mentioned 4 x 48V strips. This is a 48V 4A driver, so i was implying that you would run them in parallel.
 
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