Where did you find this data? I don’t think there is any difference in lm301b vs lm301h. The only differences im aware of come in flux and voltage bins. If flux and voltage bins are the same then lumen/watt or umol/joule of same cct are exactly the same.
Correct, large difference in quality and performance. For our purposes is basically comparing a $.30 led to a $3 led.
I found the information on the specs sheets for each diode on the Samsung website. I posted the specs on one of the threads about green beams lights @dbrn32
This is a good one. VIPARSPECTRA P1000 Led Grow Lights for Indoor Plants Full Spectrum with Samsung Diodes(Includes IR), Dimmable 100W Grow Light 2x2 Coverage Plant Growing Lamps for Plants Veg and Bloom https://a.co/d/hrObg5i
The H and B are built on identical platforms. H is the horticulture spec (more specific wavelengths), … I believe the most confusion in this category of diodes comes into play with the sorting, both of the diodes are EXCELLENT. If you happen to purchase a fixture with these diodes you have an excellent fixture, if your light has “top bin” that are binned SK you have an output of 37lm@65ma or SL binning outputs 39lm@65ma the top bins are simply diodes that tested better than the base specifications after production and gets price marked up a whole bunch cuz of it. * this does NOT mean that the diodes not sorted to top binning aren’t great quality, but all of this is going to wayside soon with the launch and mass production of the LM301 EVO. Read up, huge light changes coming!!!
I just don’t think this is accurate. I think they are same exact led and the lm301b lists specs in lm/watt and 301h data slists specs in umol/joule.
There was a bulletin put out by Samsung a few years back that one specific cct on lm301h had chart listed that wasn’t accurate. It was simply an error.
"At 3.10 micromoles per joule (μmol/J), the newly introduced LM301H now features the highest photon efficacy** among today’s mid-power white LED packages.
Samsung is able to achieve this advancement in photon efficiency by optimizing the chip’s light-emitting layer to convert electrical energy into photons with greater efficiency, while an improvement in chip structure minimizes light loss, delivering more light to plants. Titanium dioxide around the chip also ensures higher durability when exposed to agricultural chemicals.
LM301BLM561C, and two linear modules - Q-series and H inFlux. These LED component families now include PPF values of **0.52μmol/s (65mA)**0.49μmol/s (65mA), 24μmol/s (0.45A, 21.9V) and 114μmol/s (1.38A, 46.9V), respectively.
In addition, the white LED packages and modules feature extremely high light efficacy of 2.92 micromoles per joule (μmol/J) (65mA) 2.72μmol/J (65mA)
This is where i found a difference in the leds. It’s a horticultural based version of the LM301B that got some refinement. - based off corporate PSA and research.
If you have a 2000 Toyota Camry and a 2001 Toyota Camry same base car, with very slight manufacturing differences to improve functionality.
I’m not in disagreement that it’s the same diode, it’s just got some specific horticulture attributes.
This is what im saying, there is no specific horticulture attributes. It’s literally same led they package with different model numbers and data sheets. It’s all about which industry each is marketed too. This is basically old news, i just thought maybe there were some new flux bins released in one but not the other or something. The evo chip will be different as has different base led, similar to what cree and nichia have been doing to get high efficacy high cri leds.
Back when lm301h was new there was a few guys building lights out of their garages claiming to have superior lights than those with lm301b. There was several podcasts and YouTube videos put up by major players, even those using lm301h verified it was same led. I think hlg was on dudegrows with the bulletin from Samsung and sphere data from both. But migro, plc, and probably others too.
Will the EVO be a different base led? They’re calling it LM301 B/H EVO there is another one I’ve ran across while researching the EVO it’s called LH35… any word on that one?
Yes. These “white” leds have typically been phosphor coating over 450nm led. The lm301h evo moves from using the 450nm led to using a 435nm led.
Is it lh35 or lh351d? Im familiar with lh351d because it’s popular among flashlight builders and a few i know are into this. The lh351d is in a different class of leds, considered a 10 watt led in comparison to a 0.2 watt lm301b/h.
I haven’t looked into LH35 at all. I just noticed it mentioned in an article on the EVO without any real details. Just curious. Took a quick peek just now and it does appear that it’s a flashlight led. 