Samsung LM301B first impressions with new build

Hot Damn,

These things are bright. Picked up a few of these off digi-key, I was able to use a driver I had already cranked way down. Right now they are currently getting approx 120 ma each diode so according to samsung calc I should be getting around 196 lm/w. Currently using 4 of the 560mm strips as some vertical side support. Strips are 5000k. Each strip has 40 diodes in a 8 series 5 parallel config. Same specs as LM561c as 200ma is max per diode. They are each attached to 1" aluminum U channel and stay fairly cool to the touch. Each strip is attached to each corner pole.

Main light is 4 x vero 29 c 3000k 80 cri, plus 6 x vero 10 2000k. Total power can hit 550w, currently running at 400w in a 100cm x 100cm tent. Plants are growing like a beast compared to when I was using the alibaba fake s6's. These diodes are tiny and pack quite the punch, I think they are perfect for side and supplemental lighting. Planning on running all three spectrums for the entire grow. BTW plants are Master Kush, 707 Truthband, Critical Kush, and OG-18.

Hey @nc208 have you seen these LM301B's built into boards anywhere yet? Have you seen longer 120 diode/m strips?

Hi how's it going with the Lm301b ?

They work very well. Just finished a run with them. Not a huge noticeble difference between these and the lm561b I ran last grow to be honest.

FranklinTokes said:

Hey @nc208 have you seen these LM301B's built into boards anywhere yet? Have you seen longer 120 diode/m strips?

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Nope

FranklinTokes said:

Hey @nc208 have you seen these LM301B's built into boards anywhere yet? Have you seen longer 120 diode/m strips?

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The new H-inFlux strips also comes with LM301B and looking awesome because you can get them as double-row strips like the F-series. L06 has 88 diodes and L09 128, 32 respectively 44,6w and they get ~125mA at nom. current.




Thats the calculator output for 3000°k at 65mA per diode



...and for 4000°k.

Randomblame said:

The new H-inFlux strips also comes with LM301B and looking awesome

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... plus they come on a MCPCB aka aluminium!

The double row one looks nice.

I wouldn't mind getting a real of diodes at some point and getting off my lazy arse and making some boards. Would be a pain in the but without a pick and place.

@Randomblame they look great, ive got l06 and l09 on order

diyled said:

@Randomblame they look great, ive got l06 and l09 on order

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Are also on my list! I already have the base plates for two new ones, lol!
Yepp, the next one comes with small reflector wings...

Randomblame said:

The new H-inFlux strips also comes with LM301B and looking awesome because you can get them as double-row strips like the F-series. L06 has 88 diodes and L09 128, 32 respectively 44,6w and they get ~125mA at nom. current.

View attachment 4120775
View attachment 4120776

Thats the calculator output for 3000°k at 65mA per diode

View attachment 4120778

...and for 4000°k.
View attachment 4120780

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So for the led noob like my self how much better are they then the f strips?
Will they run hotter?
Where to get them arrow or digikey?

They run at only 55°C, at least it sounds so when you read the announcement. I'm sure digikey/arrow will sell them when they are broadly available. @diyled will sell them too, which is interesting for europian buyers cause one can safe custom tax when shipped via GLS.
The calculator gives out the following number:
LM561c/4000°k is 194,8lm/w at 65mA 55°C
LM301b/4000°k is 208,4lm/w at 65mA 55°C
So ~6,5-7% better at test current.
But the difference in effiency between H-inFlux and F-series could be ~8-10% because of the better thermal management. F-strips and H-inFlux both run their diodes with 125mA but the latter run with only 55°C while F-strips run with 65°C.

diyled said:

@Randomblame they look great, ive got l06 and l09 on order

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do you know where to order these state side?

PetFlora said:

do you know where to order these state side?

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I get all my strips from digikey.
SL-B8V3N80LAWW
SL-B8V4N90LAWW

diyled said:

I get all my strips from digikey.
SL-B8V3N80LAWW
SL-B8V4N90LAWW

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Thanks for the model numbers.

Over a week ago I was on the phone with one of their sales people. He seemed lost. After our initial conversation, he did not follow through

I also need a correct wall wart.

The application is lighting for workstations, so like 35-50w of NW is plenty, it is likely to be n 15 hours a day 6 days a week, so a quality heat sink is essential. It will be exposed to the room

PetFlora said:

Thanks for the model numbers.

Over a week ago I was on the phone with one of their sales people. He seemed lost. After our initial conversation, he did not follow through

I also need a correct wall wart.

The application is lighting for workstations, so like 35-50w of NW is plenty, it is likely to be n 15 hours a day 6 days a week, so a quality heat sink is essential. It will be exposed to the room

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No need for quality heatsinks, they run with 55°C at nom. current without heatsink. A simple c-channel is more than enough and would keep them probably in the mid fourties.

Randomblame said:

The calculator gives out the following number:
LM561c/4000°k is 194,8lm/w at 65mA 55°C
LM301b/4000°k is 208,4lm/w at 65mA 55°C

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That's not a fair comparison since there are less LM301b on a strip. So they will have to run harder to reach the same total wattage than the individual leds on an F-strip.

Also be careful with the calculator for the LM301 or the H series strips since they messed up the underlying data. IIRC They missed the 3500K data and shifted the 4000K in the 3500K data and copied the 5000K data into the 4000K. Two of them are identical at least.

wietefras said:

That's not a fair comparison since there are less LM301b on a strip. So they will have to run harder to reach the same total wattage than the individual leds on an F-strip.

Also be careful with the calculator for the LM301 or the H series strips since they messed up the underlying data. IIRC They missed the 3500K data and shifted the 4000K in the 3500K data and copied the 5000K data into the 4000K. Two of them are identical at least.

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Thanks for the hint, mate, that was new to me.

Yeah, I prefer the H-inFlux L06 with 88 diodes as 2ft. single row F-series replacement for the same reason.
That's why I compared them at 65mA.
Makes a lot more sense as to use the L09 to replace the double row F-strips.

Checked the component calculator and indeed it has the same issue. 4000K and 5000K figures are identical. The 3500K seems to be missing, because those figures look more like the 4000K data. So use 3500K if you want 4000K figures and the 4000K and 5000K are both for 5000K figures.