Nice review George.
It is interesting how much is the battery current and voltage after 20 minutes on high mode?

Thanks for the review. The XHP50.2 in combination with the H1A boost driver is impressively efficient. The same combination and results that djozz found in the KDIY KF8.

The throw suffers though, from a combination of the low current density and new cree flip chip design LEDs, which inherently have less luminance and throw.

Thanks for the review. I want this light or at least the driver. Its crazy that 2k lumen single cell c8s are a ordinary thing now. With this set up or 3v its over 2k and with the XP-L2 it’s over 2k as well. I think this driver with a mtg2 would work nice in a c8 with a single cell.

Great review

Thank you for the review.

Enjoy

2000 lumen highest with just only 4.7A, doubt it

mrheosuper wrote:

2000 lumen highest with just only 4.7A, doubt it

Why? The battery voltage under load should be about 3.8V, using a good battery, so this means about 3.8 V *4.7 A = 17.86 W input into driver, with the 90% efficiency of the H1A this means 0.9*17.86 W=16.074 W to the led, and cree lists 2654 lumen with the 18W max input, taking this into account, and 10% losses from reflector/lens, expected lumens are 2654 lm/18 W*16.074 W*0.9 = 2133.02 lm, so above the 2000 lm at startup.
(Correct me if my math is wrong)

doubleone44 wrote:

mrheosuper wrote:

2000 lumen highest with just only 4.7A, doubt it

Why? The battery voltage under load should be about 3.8V, using a good battery, so this means about 3.8 V *4.7 A = 17.86 W input into driver, with the 90% efficiency of the H1A this means 0.9*17.86 W=16.074 W to the led, and cree lists 2654 lumen with the 18W max input, taking this into account, and 10% losses from reflector/lens, expected lumens are 2654 lm/18 W*16.074 W*0.9 = 2133.02 lm, so above the 2000 lm at startup.
(Correct me if my math is wrong)

Btw
According to this test
http://budgetlightforum.com/node/53086
The led gives 2200 lumen at 18w
And your math said the led recieve 16W, so i guess the lumen is about 2000-2100 lumen
With 10% loss of glass and reflector, maybe the number is nearly below 2000 lumen
Still impressive

Great review. Got one of these myself and am pleasantly impressed. Feels like a comfortable 2000 lumens to the naked eye compared to convoy c8 and L6, and slots nicely in between in terms of performance.

Reckon you can convince kaidomain to put a xhp35 hi into the same set up? Even keeping the current around the 4A level? I’d buy that. Don’t have enough time or skills for even simple mods myself.

Huh! I assumed because the xhp 50 and 70 came in 6V and 12V the 35 would also. Oh well, thanks for pointing that out.

On another note, I get a brief bright flicker whenever I enter low mode on mine. Just mine or do other units also do this?

darrenm wrote:

On another note, I get a brief bright flicker whenever I enter low mode on mine. Just mine or do other units also do this?

darrenm wrote:

Great review. Got one of these myself and am pleasantly impressed. Feels like a comfortable 2000 lumens to the naked eye compared to convoy c8 and L6, and slots nicely in between in terms of performance.

Reckon you can convince kaidomain to put a xhp35 hi into the same set up? Even keeping the current around the 4A level? I’d buy that. Don’t have enough time or skills for even simple mods myself.

Out of interest, with the H1A driver that is being used, is there an MCU on-board? I've looked at the photos, and everything seems to be obscured by a huge (I assume) inductor?

been thinking of getting a couple, wonder if they would slide some batteries in them for shipping purposes.
thanks for reviewing the light.

giorgoskok wrote:

Review : KDLITKER C8.2 xhp50.2
Flashlight was provided by Kaidomain for review purposes

I’d like to get this and add the convoy SS bezel.

I bought this light and I love it, dedomed the led and the beam is now alot nicer

Honestly, this light has killed xpl based c8s for me. They just don’t compete. Yes, they throw a bit further, but you can SEE so much more with this out to 200m.

I’d love to see more lights with the xhp50.2, maybe an updated A6? And bistro UI too.

I almost like it more than my Q8 (don’t tell Miller et. Al. Though!)

I think this is what the c8 should have always been from the start, C8+xhp50.2 is awesome, small and compact and yet throwy especially if you dedome the 50.2! I tried this in a regular c8, with just the shelf and it became too hot with the xhp50. So the pill really seems to help, barely gets warm at all for me in turbo or mode 3 which I normally use. Xhp50.2 gives a much better beam too, h1-a driver is good too imo!

hannesremo wrote:

I tried this in a regular c8, with just the shelf and it became too hot with the xhp50. So the pill really seems to help, barely gets warm at all for me in turbo

giorgoskok][quote=beam0 wrote:

giorgoskok wrote:

Do you happen to have any convoy C8 to check if the bezel will lego with this?

I’d like to get this and add the convoy SS bezel.

I will check it later today .

.

darrenm wrote:

Honestly, this light has killed xpl based c8s for me. ……….

I almost like it more than my Q8 (don’t tell Miller et. Al. Though!)

hannesremo wrote:

I think this is what the c8 should have always been from the start, C8+xhp50.2 is awesome!…..

.

hannesremo wrote:

small and compact and yet throwy especially if you dedome the 50.2!

Quote:

I tried this in a regular c8, with just the shelf and it became too hot with the xhp50. So the pill really seems to help, barely gets warm at all for me in turbo or mode 3 which I normally use.

That’s not necessarily a good thing. The LED will still be producing just as much heat as in the C8 with a shelf. If the C8 with a shelf gets hot, that means it is successfully transferring the heat to the outside of the light. If this host, on the other hand, isn’t getting warm, that means the heat is remaining trapped internally and not getting transferred away from the components. Depending on the output, and whether or not the light has some form of automatic stepdown, this may put it at risk of overheating.

Lived experience is it gets quite warm, but never hot, across the whole torch. I feel it’s more because the turbo is not heavily over driven (which would be a challenge on a single 18650 anyway) like we tend to do with xpls these days.

The xhp50.2 just seems to be really efficient.

I walk the dogs with both this and the Q8, and this keeps on trooping on long after the Q8 has stepped down. I’m talking 10-15 minutes with no worrisome overheating and no degradation in performance.