Xpl-hi 4000k OR sst20 4000k

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ArtieT59
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Xpl-hi 4000k OR sst20 4000k

I’ve got my next KR4 narrowed down to this, I have multiple lights with the sst20 4000k but nothing with the xpl 4000k.

How is the tint in the xpl? As good? Is it high cri?

Is the output of the xpl 4000k still high lumen like the 5000k or is it lower like in the case of the sst20 5000k and 4000k (average drop in lumens seems to be about 25%ish).

Thanks all!

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phantom23
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It’s low CRI (~75) unless stated otherwise, that’s why it produces more lumens. It may even have negative R9 (the part of CRI responsible for red color).

MascaratumB
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Here’s what I posted in this thread: SST-20 or XP-L HI??
https://budgetlightforum.com/comment/1716533#comment-1716533

MascaratumB wrote:
I have lights with XP-L HI 4000K and SST-20 4000K , and XP-L HI wins for me. As Jack Kellar said, the greenish tint in the SST-20s is quite Sick

That also happens in the 5000Ks, which only loose the greenish and become rosy when the light is beeing used in higher amps!
My Fireflies ROT66 Gen II has 5000K SST-20s and only when reaching the top of the ramping it gets “white”. That doesn’t happen with XP-L HI 5000K, which is almost pure white!

Adding that the XP-L HI is not High-CRI. But it is not a bad one!

ArtieT59
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Thank you both and thank MascaratumB, exactly what I wanted to know. My fw3a has sst20 4000k and tint is very nice, but I want the high output of the xpl. I’ll probably go that way.

Question, did you have to modify a carclo 10621 optic with the xpl-hi ? I see mtn E sells a modified one I didn’t know if it’s necessary

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

Unheard
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I’m a big fan of the XP-L Hi 5D, use them in the RRT01 and even ordered the Noctigon KR1 with this LED. Much nicer tint than SST20.

Smile, you cannot kill them all.

MascaratumB
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Artiet59 wrote:
Thank you both and thank MascaratumB, exactly what I wanted to know. My fw3a has sst20 4000k and tint is very nice, but I want the high output of the xpl. I’ll probably go that way.

Question, did you have to modify a carclo 10621 optic with the xpl-hi ? I see mtn E sells a modified one I didn’t know if it’s necessary


Hum, I guess you don’t need to modify the optic, but I don’t have teh KR4, so I can’t be sure.
But as the XP-L HI is “flat” I guess it will not interfere with the optic, if that is what concerns you Wink
Glad it helped Wink
ArtieT59
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Unheard wrote:
I’m a big fan of the XP-L Hi 5D, use them in the RRT01 and even ordered the Noctigon KR1 with this LED. Much nicer tint than SST20.

Thank you!

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

ArtieT59
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MascaratumB wrote:
Artiet59 wrote:
Thank you both and thank MascaratumB, exactly what I wanted to know. My fw3a has sst20 4000k and tint is very nice, but I want the high output of the xpl. I’ll probably go that way.

Question, did you have to modify a carclo 10621 optic with the xpl-hi ? I see mtn E sells a modified one I didn’t know if it’s necessary


Hum, I guess you don’t need to modify the optic, but I don’t have teh KR4, so I can’t be sure.
But as the XP-L HI is “flat” I guess it will not interfere with the optic, if that is what concerns you Wink
Glad it helped Wink

Ok thank you

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

Pavlo
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If you plan on using your light on higher modes more regularly, I’d go SST20 4000K and the color rendering will be amazing, with very similar throw to the XP-L Hi.

If you plan on using your light frequently in lower modes, the SST20 4000K will turn more green, so the XP-L Hi will be the better option.

As for overall output, our eyes are very sensitive and will dilate according to the scene. A +20% increase in brightness you get with lower CRI LED’s is not very noticeable to start with, and once your eyes are given the chance to adjust to the scene, makes even less of a difference.
On the other hand, you can’t make up for poor color rendering. The SST20 will be superior, and everything will appear more saturated, vibrant, and you will get a sense of increased clarity over a low CRI option.

ArtieT59
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Pavlo wrote:
If you plan on using your light on higher modes more regularly, I’d go SST20 4000K and the color rendering will be amazing, with very similar throw to the XP-L Hi.

If you plan on using your light frequently in lower modes, the SST20 4000K will turn more green, so the XP-L Hi will be the better option.

As for overall output, our eyes are very sensitive and will dilate according to the scene. A +20% increase in brightness you get with lower CRI LED’s is not very noticeable to start with, and once your eyes are given the chance to adjust to the scene, makes even less of a difference.
On the other hand, you can’t make up for poor color rendering. The SST20 will be superior, and everything will appear more saturated, vibrant, and you will get a sense of increased clarity over a low CRI option.


thank you, pavlo. all very helpful information!

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

ArtieT59
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MascaratumB wrote:
Artiet59 wrote:
Thank you both and thank MascaratumB, exactly what I wanted to know. My fw3a has sst20 4000k and tint is very nice, but I want the high output of the xpl. I’ll probably go that way.

Question, did you have to modify a carclo 10621 optic with the xpl-hi ? I see mtn E sells a modified one I didn’t know if it’s necessary


Hum, I guess you don’t need to modify the optic, but I don’t have teh KR4, so I can’t be sure.
But as the XP-L HI is “flat” I guess it will not interfere with the optic, if that is what concerns you Wink
Glad it helped Wink

I just looked at the 10621 optics description again on mtn E site and the modification for the xpl emitter is ONLY for the domed XPL HD. you were correct, and after you answered me my question started to not make too much sense Facepalm thank you.

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

phantom23
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Pavlo wrote:

If you plan on using your light frequently in lower modes, the SST20 4000K will turn more green, so the XP-L Hi will be the better option.

Thing is – compared to high CRI emitters all low CRI LEDs from Cree look green on all modes.
MascaratumB
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Artiet59 wrote:

I just looked at the 10621 optics description again on mtn E site and the modification for the xpl emitter is ONLY for the domed XPL HD. you were correct, and after you answered me my question started to not make too much sense Facepalm thank you.

Hey, no problem! I didn’t even remember of the XP-L HD, but yes, with those leds the optics need to be modified, as the dome is quite large and will be pressed too much!
I have a triple XP-L HI (5000K) and had no problems with the optic so far Wink
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MascaratumB wrote:
I didn’t even remember of the XP-L HD, but yes, with those leds the optics need to be modified, as the dome is quite large and will be pressed too much!

I’ve read this multiple times now but I cannot confirm it. I never had problems fitting any XP-L2 into any 106xx, the optics go on and off without any resistance.