I have a pre-covid S21A and M21B with SST40s that i want to upgrade.
If i get the same lights i can get XHP-50 and XHP-70 to maximize lumens.
Are there comparable 21700 lights i should consider instead? Onboard charging not necessary.
No need to buy entire lights–the hosts are as relevant today as they were when you got them, and it is more sensible to get new drivers/emitters to swap in.
The XHP50/70 emitters are now made obsolete by the LHP531 (3V 10A) and LHP73B (3V 20A).
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It is not safe for me to solder anything due to fine motor control issues.
Tell me more about these new emitters.
I see, I’m sorry! If you couldn’t find anyone to mod for you, it might be sensible to get new lights.
LHP531 and LHP73B are both custom emitters commissioned by Convoy. The LHP531 is domeless but very floody emitter. It’s like an XHP50.2, but has more output, more intensity, and better tint, just better in every way.
Similarly, LHP73B is like an XHP70.2, but better in the exact same ways.
Both are available for under $2; LHP531 is already available in 1800K-6500K, 70CRI, and the LHP73B soon will be too.
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[quote=“QReciprocity42, post:4, topic:229560, full:true”]
I see, I’m sorry! If you couldn’t find anyone to mod for you, it might be sensible to get new lights.[/quote]
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[quote]LHP531 and LHP73B are both custom emitters commissioned by Convoy. The LHP531 is domeless but very floody emitter. It’s like an XHP50.2, but has more output, more intensity, and better tint, just better in every way.
Similarly, LHP73B is like an XHP70.2, but better in the exact same ways. [/quote]
Interesting. I find the SST40 has terrible CRI and tint, are these emitters as good as the XHP-50-70? I have a couple 70.2s in 70CRI and they are adequate.
[quote]Both are available for under $2; LHP531 is already available in 1800K-6500K, 70CRI, and the LHP73B soon will be too.
[/quote]A very good price!
The SST40 has terrible tint for 2 reasons: it has terrible angular tint shift, and after averaging the tint over angle, is still green. The LHP series are domeless, which takes care of tint shift, and have been manufactured specifically to have a non-green tint.
In terms of CRI, the LHP series should be slightly better: the SST40 tends to end up in the high 60’s, while the LHP sometimes achieves low 70’s.
The 70.2 has pretty bad angular tint shift, this should be much better.
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So you recommend the LHP over the 50.3 and 70.3?
Also bearing in mind these hosts will not hold high lumens for long.
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We’re talking seconds before getting very hot. Also remenber about high drain cells for the LHP73B.
Both 531 and 73B are more of the XHP70 competitors, XHP50.2 is old, newer 50.3 HI has its place because it has smaller LES and therefore provides much better throw than any LHP emitter.
Better tint - debatable, with Cree you have tighter control an if you choose the right tint bin you’ll get really nice light (xA and xD bins are really nice, XHP70.3 3A is lovely and creamy, zero green). LHP are great if you want the most output over anything.
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This is the reason why I compare the LHP to XHP50/70.2, rather than .3HI. The .3HI will throw more at the same drive power. If both emitters are driven to their respective maxima, it is possible that the LHP will throw more.
Compared to XHP50/70.2, there is no debate at all. Compared to XHP50/70.3HI, one can argue for both sides. Though I’ve heard many reports of exceptionally good tint for LHP531 in 6500K, something I never hear about Cree 6500K emitters.
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I tend to go for 5000K in lights these days.
I’d be buying the .3 emitters since that is what Convoy is offering for these lights.
I am surprised to get no other light recommendation, are the S21A and M21B the apex of flashlight design?
There are too many.
I know that maybe that’s not what you mean but i really like my S21B. It has nice knurlings externally. And of course, S21A and M21B come in multiple colors. And S21B in black and gray. The XHP50.3 at C8+ seems to come with a more powerfull driver: 6V 4A.
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While i wish i could buy one of every light, i did not get that much birthday money! 
I have been finding my preferred colour is grey. Boring perhaps but its nice. My current S21A is grey already and M21B is black, but plan to get gray if i buy that.
I’m questioning if i need new lights at all, but being very out of date i thought i should modernize a bit, i did at least sell most of my XM-L lights, though i still use some.
One question i do have is if i get an XH-P70.3 M21B, how long will it hold full lumens since it uses a 6V 5A driver? Also how many lumens can it sustain?
Anyone else noticing Convoy’s site is glitchy recently?
I still like SST40 and XML2. I use them daily. I don’t like SFT40. I haven’t yet bought a led from the XHP series. I consider them for their greater efficiency and more lumens they offer. I would lean towards 5700K more, a tint that is offered from XHP70.3 R9050 and 3v XHP50.3 right now.
It works normally to me, both at my mobile phones or my pc’s.
You can checkout this review. It uses the XHP variant i mentioned. The 5700K R9050. Maybe there are here tests as well.
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If you prioritize throw, get the XHP70.3HI. If you prioritize efficiency and sustainable lumens, the LHP73B is marginally better.
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Almost no current high lumen flashlight can hold max brightness for long, all of them have timed step down, brightness goes down after 3 minutes, quite often less than that. 1000 sustained lumens is a good result in a single-cell flashlight. There are flashlight with ~4000lm at startup and 500lm sustained brightness.
I’d consider LHP531 as well, driven at 10A/3V it should be about as bright as XHP70.3 R70 but with slightly better throw. LHP73B is absolutely mind blowing but only at short bursts.
I wouldn’t, going above 5000K introduces cold blueish hues.
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LF73B is driven at double the power, it will have more throw at max brightness as well but for a short time.
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