4000K dilemma

Niko · 2018-10-25T09:03:04.000Z

I need advice which emitter can give the most light at 2.2 amperes current.
which has the smallest vf, max iluminance, nicer beam…

I need a flood beam
-NICHIA NVSL219C R9050 D240 4000K CRI92
-SAMSUNG LH351D 4000K 90CRI LED (SPHWHTL3DA0GF4T0Q6)
-LUMINUS SST-20 J4 FB4 NEUTRAL WHITE 4000K CRI95

thx in advance

zeroflow · 2018-10-25T09:18:46.000Z

Have you tried searching at all?

Nichia 219C D260 - 2200mA should yield around 650lm

Samsung LH351D 5000K 90CRI - 2200mA should yield around 1000lm

SST-20 4000K Test by maukka - 2200mA should yield slightly below 600lm

Bob_McBob · 2018-10-25T09:41:29.000Z

As zeroflow noted, LH351D is by far the highest output of the three. The 4000K is not a whole lot lower than the 5000K.

adam7027 · 2018-10-25T10:30:51.000Z

Just a notice: the test, which TA presented, is for the CRI70 variant of LH351D - no way, that the 90 CRI variant could output that much (1000lm) at the mentioned current.

Niko · 2018-10-25T10:35:52.000Z

zeroflow:

Have you tried searching at all?

Nichia 219C D260 - 2200mA should yield around 650lm

Samsung LH351D 5000K 90CRI - 2200mA should yield around 1000lm

SST-20 4000K Test by maukka - 2200mA should yield slightly below 600lm

nichia is D240
samsung is 4000 not 5000K

zeroflow · 2018-10-25T10:50:59.000Z

That was just the best data I could find.

After that, you could of course compare the data shown in the datasheets to get a feel how much lower the 90CRI 4000K would be in comparison to 70CRI 5000K

Geuzzz · 2018-10-25T13:13:17.000Z

In which light are you planning the led? You dont mention cri. If you don’t need the highest cri. 5D xml2 of xpl hi can be very nice tint wise.

Niko · 2018-10-25T13:46:06.000Z

I need choose between this 3 (exactly) in first post.
All are 4000k hi cri

twisted_raven · 2018-10-25T14:49:57.000Z

My vote is the SST20

BlueSwordM · 2018-10-25T15:04:12.000Z

The 219C has the lowest VF of them all, the Samsung LH351D is next, and the SST-20 has the highest VF.

The SST-20 has the nicest beam with nice throw, LH351D is up next with a very nice beam, but floodier, and there is the 219C which last but not least, with a nice beam still, but some green in the spill.

The LH351D is the most efficient, with the 219C and SST-20 being the same.

Therefore, the best balance of brightness and beam would be the LH351D.

If you want more throw, get the SST-20.

For regulated builds where the concern is just runtime, the 219C would be your best bet.

The_Driver1 · 2018-10-25T15:36:40.000Z

The SST-20 also has the highest light quality of those three. Nichia would call it “R9080”.

BlueSwordM · 2018-10-25T16:04:55.000Z

Oh yeah. The SST20 has an extremely nice beam with very high color rendition.

Niko · 2018-10-25T18:06:10.000Z

therefore the highest output have samsung. Does anyone know what exactly is power on 2.2amps ?

eas · 2018-10-26T03:28:00.000Z

Exactly? No. Approximately? 7W.

Niko · 2018-10-26T08:25:33.000Z

Yes current is 2.2amps constant