LED recommendation for Emisar D4V2 / D4K

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oeL
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LED recommendation for Emisar D4V2 / D4K

Does someone please have a LED recommendation for Emisar D4V2 / D4K? I am planning to buy the boost driver option. My preferences (in this order):

- Color rendering
- brightness (lux)
- lumens

Would you recommend SST20 4.000 K 95 CRI or Nichia 219BT-V1 R9080 4500K?

Thank you

1stein
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Let me take this opportunity to link my own question in regard to Emisars.
I’m aiming in 5700K, rather long throw, high CRI is just nice to have.
Which led will sustain the highest lumen output through most of the running cycle?

Chicken Drumstick
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1stein wrote:
Let me take this opportunity to link my own question in regard to Emisars.
I’m aiming in 5700K, rather long throw, high CRI is just nice to have.
Which led will sustain the highest lumen output through most of the running cycle?

5700k is pretty cool. Things (out door things like trees/grass) will generally look better with a lower K and higher CRI.

As a rule you won’t get long throw and high lumens. You can get high lumens and ok beam distance, but you’ll be running it hard and hot for short periods of time. More throwy emitters as smaller and thus less lumens. But they will be able to project light a long way, even on lower output modes.

The LED options listed on the D4k page, the SST-20 is probably the best all round and should be able to sustain output quite well while still have some beam distance.

The W2 makes surprisingly high lumens for its tiny size. But you have to drive it very hard to achieve this, so lots of heat. But it should offer the most throw I’d think. The Nichias should look nice, but will probably underperform in throw and output.

1stein
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This is right but I’m currently switching from 4000K highCRI to 5500-6000k BBL close. So after Three Years of aiming in good colors and warm whites, I’m turning more to cooler white, but close to BBL line.

So far my D4s with 4x XP-L high did a great job, if it’s 5700K – great. I just need to sustain the highest possible output. That’s the priority.

PS: this is about my bicycle setup. For closer work eg seldering, high CRI is a must. And no PWM.

oeL
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1stein wrote:
PS: this is about my bicycle setup. For closer work eg seldering, high CRI is a must. And no PWM.

Yes, for the bicycle, output matters Thumbs Up I am using an Acebeam BK10, but it can only sustain 1.000 lumens. The two-zone shape of the beam is very nice for bicycling, however.

My use case for an EDC is nature stuff, like helping frogs across the road, or picking mushrooms. There, high CRI is important. Brightness matters as well, but just in combination with high efficiency. This is why I am asking for your ideas about SST20 4.000 K 95 CRI vs. Nichia 219BT-V1 R9080 4500K. The first one I know, It’s nice. Is the second one an improvement in terms of color rendering? What about brightness? If CRI is same or better, I would prefer 4.500 K over 4.000 K.