Nichia 757 optisolis vs samsung lm301 leds

Grow Lights Australia

Grow Lights Australia

Well-Known Member
Orblight said:
Any thoughts on these 2 diods? I've seen nichia ran tests on Samsung's lm301 proving they don't get the performance Samsung claims but of course they would say that.
Nichia are made in Japan and claiming some crazy numbers like 3.0 umols/j and a cri of 98 - 100
Anyone have experience or knowledge with the nichia 757 optisolis?
Click to expand...
LED Teknik has tested quite a few Nichia and Samsung diodes over the years and found that Nichia LEDs usually match or slightly exceed advertised specs, whilst Samsung advertised specs are a bit more optimistic. Everything depends on available bins, but the top Nichia bins are the most efficient mid-powers available at the moment. The NF2W757HT-F1 R70 5000K we use are around 3.15 umol/j. Even though Nichia publishes a higher bin that is 2.5% better (P13 vs P12), you cannot buy them. The P13 bin is the highest Nichia can produce, but they have no yield. So we use P12.

Nichias are usually about 2% better than Samsungs when comparing the same specs so not much in it. For example a top bin CRI80 3000K Nichia V3-F1 puts out 223lpw vs a top bin CRI80 3000 Samsung which puts out 220lpw. The Nichia phosphor has a QER of 4.82 vs 4.72 for the Samsung, so even though there is only 1% difference in lumens per watt, there is 2% difference in phosphors (in favour of Nichia). Nichia tends to have more efficient phosphors than other manufacturers.

Optisolis are not that efficient due to the broad-spectrum phoshor. We used them on the original High Light boards and they were just under 2.5 umol/j for the CRI98 2700K. They are a nice LED but they are also very expensive – up to 3x what you might pay for an average CRI80 LM301B.

There is always a trade-off between efficiency and spectrum. But just to be clear, the 3+ umol/j Nichia LEDs are not the high CRI versions. You might be thinking of our new High Light 420 boards, which are 3 umol/j but use a mix of Nichia and custom mid-powers and monos. We have six different types of LED on each board.

The new GE Trigain phosphors @welight mentioned are already available on Nichia's website: https://www.nichia.co.jp/en/product/led_product_data.html?type='NFSW757H-V1'

The phosphor looks good on paper, but the LEDs are a single die (the "S" in NFSW757 stands for single die – dual-die LEDs have a number 2 in the product code, such as NF2W757), which means the voltages are higher and the efficiency drops off faster than the dual-die chips as you near maximum current. The main advantage is they offer more cyan at better efficiency than other white phosphor LEDs and are cheaper to produce.

We looked at Osram's Osconiq, but Nichia was slightly better (more efficient) on paper for a similar price.
 
O

Orblight

Well-Known Member
Grow Lights Australia said:
LED Teknik has tested quite a few Nichia and Samsung diodes over the years and found that Nichia LEDs usually match or slightly exceed advertised specs, whilst Samsung advertised specs are a bit more optimistic. Everything depends on available bins, but the top Nichia bins are the most efficient mid-powers available at the moment. The NF2W757HT-F1 R70 5000K we use are around 3.15 umol/j. Even though Nichia publishes a higher bin that is 2.5% better (P13 vs P12), you cannot buy them. The P13 bin is the highest Nichia can produce, but they have no yield. So we use P12.

Nichias are usually about 2% better than Samsungs when comparing the same specs so not much in it. For example a top bin CRI80 3000K Nichia V3-F1 puts out 223lpw vs a top bin CRI80 3000 Samsung which puts out 220lpw. The Nichia phosphor has a QER of 4.82 vs 4.72 for the Samsung, so even though there is only 1% difference in lumens per watt, there is 2% difference in phosphors (in favour of Nichia). Nichia tends to have more efficient phosphors than other manufacturers.

Optisolis are not that efficient due to the broad-spectrum phoshor. We used them on the original High Light boards and they were just under 2.5 umol/j for the CRI98 2700K. They are a nice LED but they are also very expensive – up to 3x what you might pay for an average CRI80 LM301B.

There is always a trade-off between efficiency and spectrum. But just to be clear, the 3+ umol/j Nichia LEDs are not the high CRI versions. You might be thinking of our new High Light 420 boards, which are 3 umol/j but use a mix of Nichia and custom mid-powers and monos. We have six different types of LED on each board.

The new GE Trigain phosphors @welight mentioned are already available on Nichia's website: https://www.nichia.co.jp/en/product/led_product_data.html?type='NFSW757H-V1'

The phosphor looks good on paper, but the LEDs are a single die (the "S" in NFSW757 stands for single die – dual-die LEDs have a number 2 in the product code, such as NF2W757), which means the voltages are higher and the efficiency drops off faster than the dual-die chips as you near maximum current. The main advantage is they offer more cyan at better efficiency than other white phosphor LEDs and are cheaper to produce.

We looked at Osram's Osconiq, but Nichia was slightly better (more efficient) on paper for a similar price.
Click to expand...
Thanks for the detailed info.
 
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