Samsung LM301B Diodes

Takeshy

Takeshy

Well-Known Member
Hello!

I'm starting a DIY project for a LED.
I have seen many people talking about LM561C diodes but samsung has released 2 months ago LM301B.
These new diodes are much more efficient (max. 220lm/W @ 3500k LM301B LT-Q282A/LT-Q562A/LT-QB22A Strip).

Wouldn't these new diodes be way better than LM561C diodes?

Prices:
LM561C 4 feet HB22D Strip: (22.21$ each)
https://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8T221B2HUS/1510-1578-ND/

LM301B 4 feet LT-QB22A Strip: (23.21$ each)
https://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8U201B20US/1510-2290-ND/

More info about LM301B diodes:
Leaflet:
http://www.samsung.com/global/business/business-images/led/file/product/products/201706/LM301B_Leaflet_170421.pdf
Data sheet:
http://www.samsung.com/global/business/business-images/led/file/product/products/201708/Data_Sheet_LM301B_Rev.1.1.pdf

More info about LM301B LT-Q282A/LT-Q562A/LT-QB22A Strips:
https://media.digikey.com/pdf/Data Sheets/Samsung PDFs/LT-Q282A_562A_B22A_Rev0.0_6-19-17.pdf

[EDIT] Updated links and prices.
 
Last edited:
tomate

tomate

Well-Known Member
LM561C F-series Strip -> 8670lm
LM301B Strip -> 3680lm

This is a difference. You have to pay more than twice as much for the same amount of light.
A LM561C F-series stripe can be as efficient as a LM301B stripe if you run them at a lower current.
 
Takeshy

Takeshy

Well-Known Member
tomate said:
LM561C F-series Strip -> 8670lm
LM301B Strip -> 3680lm

This is a difference. You have to pay more than twice as much for the same amount of light.
A LM561C F-series stripe can be as efficient as a LM301B stripe if you run them at a lower current.
Click to expand...
I never thought about that series althought you have to consider that you will consume more watts per strip to give that amount of lm.
LM301C is more efficient but it will cost more to build. I would need more LM301C diodes to reach the same amount of lumens that LM561C diodes has.

Stephenj37826 said:
Maybe so but the 3000k is way off. View attachment 4001979
Click to expand...
Still is the most efficient even in the 3000k spectrum.
 
Stephenj37826

Stephenj37826

Well-Known Member
Takeshy said:
I never thought about that series althought you have to consider that you will consume more watts per strip to give that amount of lm.
LM301C is more efficient but it will cost more to build. I would need more LM301C diodes to reach the same amount of lumens that LM561C diodes has.



Still is the most efficient even in the 3000k spectrum.
Click to expand...
Sure but lumens don't equal photons. That's what I'm getting at. It is not all cut and dry in Horticulture.
 
robincnn

robincnn

Well-Known Member
As LED manufacturers are approaching efficiency limits with die, they are trying to boost lumens by changing the phosporus to get more Spectrum within human light sensitivity.
This help boost the lm/w . Good for lighting. Horticulture .... Not so sure..

Note that lm/w is not a measure of radiant efficiency. Just like 90 CRI will have much lower Lm/w but the radiant efficiency may not be that much lower.

301B may be more radiant efficient compared to 561c. However spectrums are very different so lm/w is not a fair comparison of radiant efficiency for 561C vs 301B.
Overlapping 3000k ,with 301B the blue peak is higher, red has shifted slightly left (slightly less deep red)

Let HLG know if you see these 301B strips in stock anywhere. hLG may be able to send them for sphere in next batch of testing and see how it stacks up against 561C

Which one should u go with. Both awesome. Whatever fits budget. If you go with 301b based, go with 1 step lower CCT or mix a lower cct.
 
Last edited:
T

tsmit420

Member
if the 3000k spectrums are indeed different
robincnn said:
As LED manufacturers are approaching efficiency limits with die, they are trying to boost lumens by changing the phosporus to get more Spectrum within human light sensitivity.
This help boost the lm/w . Good for lighting. Horticulture .... Not so sure..

Note that lm/w is not a measure of radiant efficiency. Just like 90 CRI will have much lower Lm/w but the radiant efficiency may not be that much lower.

301B may be more radiant efficient compared to 561c. However spectrums are very different so lm/w is not a fair comparison of radiant efficiency for 561C vs 301B.
Overlapping 3000k ,with 301B the blue peak is higher, red has shifted slightly left (slightly less deep red)

Let HLG know if you see these 301B strips in stock anywhere. hLG may be able to send them for sphere in next batch of testing and see how it stacks up against 561C

Which one should u go with. Both awesome. Whatever fits budget. If you go with 301b based, go with 1 step lower CCT or mix a lower cct.
Click to expand...
it

doesnt matter that much either way but if you look closely enough the 301b has less green in the 550 range but your right also less deep red which will hurt par, the blue however may not hurt par too much, lumileds has phosphor converted red leds (sunplus line) for horticulture they give ppf information. the one with 25 percent blue has higher ppf then the one with 12 percent because of how phosphors hurt efficiency. but were really just pulling hairs here. your absolutely right about high cri not being as inefficient as people think but they also have more green which can hurt the ppf, combining 70 cri and 90 cri will give you about the same amount of green and the same luminous efficiency as 80 cri but with a much wider spectrum on the red end and perhaps higher ppf in theory, its too bad that there not as easily available as the 80 cri
 
N

nadirep

Active Member
What about the HLG550 v2.. that is made out of LM301b's? Did HLG a sphere test to find out the exact spectrum id the same as the LM561c?
 
kaydeezee

kaydeezee

Well-Known Member
they have these LM301b strips for £39.99 at a local DIYLED shop in the uk and I was considering purchasing them since they come with build on heatsink.
5x LM301B strips & hlg320 48v for 350w and a total cost of £290

£290 for 350w of top line diodes is good business to me?
 
diyled

diyled

Well-Known Member
kaydeezee said:
they have these LM301b strips for £39.99 at a local DIYLED shop in the uk and I was considering purchasing them since they come with build on heatsink.
5x LM301B strips & hlg320 48v for 350w and a total cost of £290

£290 for 350w of top line diodes is good business to me?
Click to expand...
They are out of stock till next week but make sure you ask for free framework if you buy them.
 
Achillesactual

Achillesactual

Well-Known Member
Thanks for the heads up Takeshy am getting ready to build a strip build and figure I may as well go with the 301b's over the 561b's.
Cost is too close not to!
 
You must log in or register to reply here.
Top