The nail polish coating isn’t perfect and there might be some low-key shorting which prevents the driver from pushing 1.5A, or prevents the driver from entering the turbo mode. Which I will figure out the way to measure the tail-cap current draw.
I might have overloaded the luxmeter and it stops scaling properly past 100k lux (which is it’s stated maximum range, although it continues to register the brightness over 100k lux anyway). I might try to test again from further distance and see what happens.
75 cm is likely still too close. The main reason is that the beam is not fully collimated at short distances. I’m not sure what is the minimum good distance for C8 but if you can measure at 5m I think that should be enough.
Also, what you measure is not output but intensity. I’m nearly sure that at the same intensity XHP70.2 has much higher output.
Correct Agro, a minimum 5M throw distance should be observed for Standards.
On lights I’ve built with a mile or more throw capability I use 50M for testing. If you have the light focused for optimum distance, the V shape of the beam profile hasn’t come together at closer distances and the meter isn’t getting the concentrated light to show the true throw reading. After getting lights that throw a mile or more, I can’t think of a couple of hundred meters as being throw, gonna take 3/4 of a mile or more to consider it “throwy”.
I received the two samples yesterday, but need a few days for the test because life is quite in the way this week, no spare evenings in my cave behind the cupboard at least until the weekend.
@rngwn, could we have a picture of the GT-FC40’s footprint, please, to know if it is the same as the XHP70’s footprint (in order to swap emitter of a 12V XHP70 flashlight with larger MCPCB) ?
@rngwn, could we have a picture of the GT-FC40’s footprint, please, to know if it is the same as the XHP70’s footprint (in order to swap emitter of a 12V XHP70 flashlight with larger MCPCB) ?
I cannot see the underside of the emitter for now. I might ask the manufacturer for that, but the chances are pretty slim.
Any updates on the GT-FC40? Acebeam is planning to use the A4 bin in 4500k in their E70 and if the tint is similar to your images will hopefully be just as beautiful.
There are multiple beamshots and reviews round of the convoy models which have been released for a while now using them.
I really like my 4000-4500k, but would recommend you have a look round some more formal / experienced reviews/reviewers.
Thanks, for the heads up. I like this post the best and it seemed like you guys knew what you guys were talking about. I will search the forum. Toodaloo.
Well, someone else woke this thread up… so I am going to comment on it as well.
I now have 2 lights with the 4500k version of this led. The tint and CRI just blow me away! I will be converting several XHP70 lights to use this LED over time. Right now all I have are a stock S11 and M21b, both have become favorites for night walking lights with the small reflectors they just light up everything in front of you with a wonderful rosy light.
I did some very crude brightness measurement by shining the hotspot on a luxmeter at 1ft distance.
The measurement reads ~120k-140k lux on the highest mode (with the H2-C)
That equals to 11k-13kcd or 210-220m of throw distance in a C8s body
I’m now searching for the proper 20mm driver for these, but it’s really hard to find.
High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
11k-13kcd in a C8 head seems very low.
That could be two things:
High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
The hotspot shows much less tint shift than with the XHP70. I’m looking forward to this led in 4000K. Maybe I will use one in a Haikelite SC26.
My Youtube channel: Alllightson Reviews
My OL contest builds: 7th 8th 9th
My reviews: Sofirn SP31 V2, Nightwatch NI40, Sofirn C8F 21700, Brinyte WT01, Sofirn SD05,Ti AAA keychain, Sofirn SP33 V3, Skilhunt M150
My video-reviews: Brinyte WT01, Sofirn SD05, Ti AAA keychain, Sofirn SP33 V3
Update: Light measurement at ~2.5ft (75cm). It seems like my suspicion about the Luxmeter overloading is correct.
XHP70.2 version:
Brightness @2.5ft: 34.5k – 35.5k Lux
IntensityEstimated Output: 20.0k – 20.6kcdEstimated Throw: 283-287m
FC-40 version:
Brightness @2.5ft: 29.5k – 31.5k Lux
IntensityEstimated Output: 17.1k – 18.0kcdEstimated Throw: 262-268m
By this setup, it seems like FC-40 produces about 10-15% less output than XHP70.2 (but there is quite a hefty cost moving up CRI from 90, of course)
High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
75 cm is likely still too close. The main reason is that the beam is not fully collimated at short distances. I’m not sure what is the minimum good distance for C8 but if you can measure at 5m I think that should be enough.
Also, what you measure is not output but intensity. I’m nearly sure that at the same intensity XHP70.2 has much higher output.
I finally bought extra pair of 18650s and can now do side-by-side beamshots. Here you go.
Looks like FC-40 produces a lot throwier light than XHP70 in a C8s body.
High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
Correct Agro, a minimum 5M throw distance should be observed for Standards.
On lights I’ve built with a mile or more throw capability I use 50M for testing. If you have the light focused for optimum distance, the V shape of the beam profile hasn’t come together at closer distances and the meter isn’t getting the concentrated light to show the true throw reading. After getting lights that throw a mile or more, I can’t think of a couple of hundred meters as being throw, gonna take 3/4 of a mile or more to consider it “throwy”.
I received the two samples yesterday, but need a few days for the test because life is quite in the way this week, no spare evenings in my cave behind the cupboard at least until the weekend.
link to djozz tests
Ah well, beat me to it. At least you can see the direct tint comparison today.
I will leave the long distance measurement to Djozz then.
Two weeks sure is a long time to wait in this instance.Oh well, nevermind, there he is.High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
I need this LED!
Acebeam L18, Armytek Prime C1 Pro, Armytek Prime C2 Pro, Armytek Tiara C1 Pro, Astrolux MF01 Mini, BLF Q8, BLF A6, BLF FW1A, BLF FW3A, BLF FW3C, BLF LT1, Convoy L6, Convoy C8+ , Convoy S3, Emisar D4, Fireflies E07, Jaxman E2L, Manta Ray C8.2 long version, Olight S1R Baton II special edition series, S2R Baton II, Olight Baton 3, Olight Warrior Mini, Olight M2R Pro Warrior.
Most of them have been modded! =)
https://photos.app.goo.gl/JaJaDv4V838AEJf39
@rngwn, could we have a picture of the GT-FC40’s footprint, please, to know if it is the same as the XHP70’s footprint (in order to swap emitter of a 12V XHP70 flashlight with larger MCPCB) ?
I cannot see the underside of the emitter for now. I might ask the manufacturer for that, but the chances are pretty slim.
High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
I tested the two samples, test post here:
http://budgetlightforum.com/node/68899
link to djozz tests
Pleasessign me up for 2x of each, if possible…
Acebeam L18, Armytek Prime C1 Pro, Armytek Prime C2 Pro, Armytek Tiara C1 Pro, Astrolux MF01 Mini, BLF Q8, BLF A6, BLF FW1A, BLF FW3A, BLF FW3C, BLF LT1, Convoy L6, Convoy C8+ , Convoy S3, Emisar D4, Fireflies E07, Jaxman E2L, Manta Ray C8.2 long version, Olight S1R Baton II special edition series, S2R Baton II, Olight Baton 3, Olight Warrior Mini, Olight M2R Pro Warrior.
Most of them have been modded! =)
https://photos.app.goo.gl/JaJaDv4V838AEJf39
Please update your quantities in the GB thread.
High CRI or Bust.
Ongoing Quest: 5mm thru-hole High Power, High CRI 4500k emitter group buy.
Any updates on the GT-FC40? Acebeam is planning to use the A4 bin in 4500k in their E70 and if the tint is similar to your images will hopefully be just as beautiful.
There are multiple beamshots and reviews round of the convoy models which have been released for a while now using them.
I really like my 4000-4500k, but would recommend you have a look round some more formal / experienced reviews/reviewers.
Thanks, for the heads up. I like this post the best and it seemed like you guys knew what you guys were talking about. I will search the forum. Toodaloo.
Well, someone else woke this thread up… so I am going to comment on it as well.
I now have 2 lights with the 4500k version of this led. The tint and CRI just blow me away! I will be converting several XHP70 lights to use this LED over time. Right now all I have are a stock S11 and M21b, both have become favorites for night walking lights with the small reflectors they just light up everything in front of you with a wonderful rosy light.
EDC rotation:
KR4, SST-20 FA3 4000k (favorite!)
FW3A, Nichia 4000k sw40 r9080 (second favorite)
FW1A, LH351D 3500k (third favorite)
FW1A, XP-L Hi 3A
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
Emisar D4V2, brass E21A 3500k (night light of choice)
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