[Review] Astrolux C8 Flashlight - Compact Thrower

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wellerus
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Does this light really have so bad UI in comparison with a silver 12 groups Convoy C8?
And which battery do you suggest for astrolux C8, 30Q or 35Q?

Thanks

bunnicula
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wellerus wrote:
Does this light really have so bad UI in comparison with a silver 12 groups Convoy C8?
And which battery do you suggest for astrolux C8, 30Q or 35Q?

Thanks

Who said this light has a bad UI? As to which UI is better is a matter of personal preference. I like both UIs, the BLF A6 in the Astrolux C8 and the Biscotti firmware in the Convoy.

There is no 35Q, I assume you mean 35E. The 30Q would give a little bit higher output at Turbo compared to the 35E.

WalkIntoTheLight
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Both the silver Convoy C8 (with biscotti firmware) and the Astrolux C8 (same UI as the BLF A6) have good interfaces. Whichever you prefer is a matter of preference, but they’re similar in modes and flexibility.

The advantage of the Convoy is you can set it up as a single-mode light. The advantage of the Astrolux is that it has hidden modes, such as battery-check. I normally set both up with mode-memory, so it just turns on to the last mode I used (usually max).

I use a Samsung 30Q in both lights. It’s a high-drain cell, which is especially beneficial for the Astrolux C8 because it has a FET+1 driver which uses all the current it can from the battery.

d_t_a
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Something I like with the BLF A6 is the ability to go back to the previous brightness level with a medium-press. Biscotti is not bad either, but there’s no go backwards, have to cycle to the front (or I think long-press to reset to lowest mode). Having used both, they’re both great, though I seem to prefer the BLF A6 UI (or Bistro UI of the Astrolux S2, which also has the same go-backwards)

wellerus
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I just read reviews on BG, some people like UI and some doesn’t, so i asked here, because i don’t know what to buy a silver Convoy C8 with 12 groups or this Astrolux C8?

What about this, someone wrote this in review, does someone have the same problem?
“ Unfortunately In turbo mode smoke is generated from the LED and it’s actually clouding the reflector a bit”

https://www.banggood.com/Astrolux-C8-XP-L-HI-1A-1300Lumens-74modes-A6-Dr...EDC-LED-Flashlight-18650-p-1217415.html?rmmds=search&cur_warehouse=CN

WalkIntoTheLight
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wellerus wrote:
What about this, someone wrote this in review, does someone have the same problem? “ Unfortunately In turbo mode smoke is generated from the LED and it’s actually clouding the reflector a bit”

Smoke? That sounds like a defective unit. The LED should certainly not smoke. I don’t know how it could smoke and still work, though.

I wonder if it really was smoke. I notice that when I’m using some of my lights outside in cold weather, the inside of the lens can fog up when the light is on. I presume that’s from moisture somewhere in the light that is heated up and the cold glass condenses it.

contigo
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I have never experienced any “smoke” in the reflector. I like the UI and the light itself. I would buy it again in a heartbeat.
It has a really far reaching throw, it surprises me everytime because im expecting small lights to not reach very far. Not the case with this.
I havent had ANY problems with my C8

WSB
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Got my astrolux c8 today:) great throw for its size. Looks to be similar cd as my Utorch UT02, but with more Lumens. I noticed the astrolux has a better quality beam to the standard convoy c8, more focus and cleaner. Your not going to find a better thrower at this low
Price IMO. I got it on sale for under $30 canuckistan copacks, lol

eas
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Has anyone compared the Astrolux C8 head-to-head with the Sofirn C8T?

.

teacher
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Very nice review!! Thank you…… . Thumbs Up

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GreenLights
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I received my Astrolux C8 today, and it is quite impressive. I’m easily impressed because I don’t have much to compare it to, yet, besides the Convoy C8. One thing I noticed right away is a distinct and bright yellow spot in the center of the beam. This is not something you need to search for, it is prominent. I got the 3A NW tint. Is this normal?

Just discovered this wonderful addiction.

Speed4goal
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Yes with xpl hi leds the middle of the beam is a different color. On cooler leds like my nitecore p12gt you can really see it

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DoubleA
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What would happen if I use an ICR cell instead of INR with this C8? would it simply give it’s max discharge current and be fine or would it burst into flames?

and on the first day he said "Let there be light"...

WalkIntoTheLight
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DoubleA wrote:
What would happen if I use an ICR cell instead of INR with this C8? would it simply give it’s max discharge current and be fine or would it burst into flames?

It would just give its max discharge current, and be fine. I’ve used old ICR laptop cells in direct-drive lights, and it’s fine. You don’t get as high output as you do with high-drain cells, but you still get good output.

I suspect it’s hard on the cell, and you likely will get fewer cycles out of the cell than you would if you used it lightly, but it’s fine.

Keep in mind that you probably won’t even exceed the max sustained current recommended on the cell’s spec sheet. That’s usually around 2C for a ICR cell, or about 4.4 – 5.2 amps. Because the voltage sags pretty far with “low drain” cells, the flashlight won’t use as much current compared to a high-drain cell (which is why you get lower output).

d_t_a
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WalkIntoTheLight wrote:
DoubleA wrote:
What would happen if I use an ICR cell instead of INR with this C8? would it simply give it’s max discharge current and be fine or would it burst into flames?

I suspect it’s hard on the cell, and you likely will get fewer cycles out of the cell than you would if you used it lightly, but it’s fine.

Keep in mind that you probably won’t even exceed the max sustained current recommended on the cell’s spec sheet. That’s usually around 2C for a ICR cell, or about 4.4 – 5.2 amps. Because the voltage sags pretty far with “low drain” cells, the flashlight won’t use as much current compared to a high-drain cell (which is why you get lower output).

I’m curious about the “2C” for ICR cell — where can I find “generalized” max discharge current info about the others — for instance for INR and IMR cells (or LiMnCo like LG HG2)?

DoubleA
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WalkIntoTheLight wrote:

It would just give its max discharge current, and be fine. I’ve used old ICR laptop cells in direct-drive lights, and it’s fine. You don’t get as high output as you do with high-drain cells, but you still get good output.

I suspect it’s hard on the cell, and you likely will get fewer cycles out of the cell than you would if you used it lightly, but it’s fine.

Keep in mind that you probably won’t even exceed the max sustained current recommended on the cell’s spec sheet. That’s usually around 2C for a ICR cell, or about 4.4 – 5.2 amps. Because the voltage sags pretty far with “low drain” cells, the flashlight won’t use as much current compared to a high-drain cell (which is why you get lower output).

Thanks, I always use my lights on sub-200 lumen modes so it won’t be that hard on the battery I presume. Turbo modes will be used only in case of emergency.

The stock tail spring current limitation might also be to my advantage Smile

d_t_a wrote:
I’m curious about the “2C” for ICR cell — where can I find “generalized” max discharge current info about the others — for instance for INR and IMR cells (or LiMnCo like LG HG2)?

2C for ICR is usually pulse discharge and continuous discharge should be less than 1C.

You can find the info you’re looking for over here.

and on the first day he said "Let there be light"...

Speed4goal
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You can usually find a datasheet for whatever cell you want on Google. Sometimes it’s a PDF file sometimes it’s a website

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DoubleA
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Speed4goal wrote:
You can usually find a datasheet for whatever cell you want on Google. Sometimes it’s a PDF file sometimes it’s a website

My LG cell datasheet mentions standard discharge current at 650mA and Max discharge at 4.8A.

and on the first day he said "Let there be light"...

WalkIntoTheLight
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Yes, always check the datasheets for the cell, easily found via google.

I’m basing the 2C discharge on the datasheets for most of my laptop cells, the Samsung ICR18650-22F and 26F. Generally, they list the max (continuous) discharge at 2C (4400mA or 5200mA). They list charging at 0.5C (standard) up to 1C (for rapid charging, but probably hard on the cells).

Anyway, for most decent 18650 cells, this light probably won’t push the cell higher than the rated discharge current. The voltage will sag and drop the current if the battery isn’t high-drain.

Of course, all bets are off if you use an Ultrafire battery or something like that.

DoubleA
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Sure, I always do check datasheets but what I didn’t know is what would happen, that is would the light draw too much current and the cell would burn or will the cell simply supply it’s maximum. Thanks for the info. So I guess it will be safe for me to occasionally use the turbo mode without worrying about burning my hands. Smile

and on the first day he said "Let there be light"...

WalkIntoTheLight
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DoubleA wrote:
Sure, I always do check datasheets but what I didn’t know is what would happen, that is would the light draw too much current and the cell would burn or will the cell simply supply it’s maximum. Thanks for the info. So I guess it will be safe for me to occasionally use the turbo mode without worrying about burning my hands. Smile

In a direct-drive light (such as the Astrolux C8), I think you’re fine. You won’t exceed the max rating of the battery, because the voltage will sag and thus drop the forward voltage of the LED.

In a light that uses a boost-driver (such as one that uses a 12v XHP emitter), it may be a different story. Depending on the driver, it might be able to draw more current than the battery is rated for. With a name-brand battery, it’s probably not good for it, but won’t result in anything exploding or catching fire. They test batteries with an external short (at less than 50 milliohms) to make sure they don’t blow up or burst into flames. IOW, way more amps than a flashlight would ever use.

DoubleA
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I see. one more thing, what size is the rubber tail clicky? I don’t need measurements just need to know are they of the same size as convoy s2+ or not?

and on the first day he said "Let there be light"...

WalkIntoTheLight
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DoubleA wrote:
I see. one more thing, what size is the rubber tail clicky? I don’t need measurements just need to know are they of the same size as convoy s2+ or not?

Looks about 17mm diameter.

Jerommel
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GreenLights wrote:
I received my Astrolux C8 today, and it is quite impressive. I’m easily impressed because I don’t have much to compare it to, yet, besides the Convoy C8. One thing I noticed right away is a distinct and bright yellow spot in the center of the beam. This is not something you need to search for, it is prominent. I got the 3A NW tint. Is this normal?

I have one XP-L HI that does the same, the others i have don’t.

2Q19

d_t_a
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I dislike the Astrolux C8 stepping down after around 40-45 seconds (due to timer-based stepdown from BLF A6 driver).

Would it be possible to change it instead to the BLF X6v2 (Bistro) driver (driver swap)? That would give it more controls.

DoubleA
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Why you could just change the delay time and simply reprogram your existing driver. Smile

and on the first day he said "Let there be light"...

d_t_a
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DoubleA wrote:
Why you could just change the delay time and simply reprogram your existing driver. Smile

Is the Astrolux C8’s factory-included driver chip re-programmable with a USB ASP programmer?
(I’ve read that the Convoy drivers chip is “locked” and cannot be re-programmed…)

I ordered a USB ASP programmer and just received it a few weeks ago, but can’t seem to get it to work… I think it’s because the SOIC clip that I ordered is not holding tight or maybe the USB programmer is just picky? (will post question in appropriate message thread…)

DoubleA
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Well it should be. If it ain’t then there are some tricks to program it.

and on the first day he said "Let there be light"...

WalkIntoTheLight
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I believe it’s the exact same driver that the BLF A6 uses, so if you can reprogram it, you should be able to reprogram the Astrolux. I agree the 45 second step-down is too short for the Astrolux C8. It should be 3 minutes, since the light has much more thermal mass and heat dissipation area, and can take at least 3 minutes on turbo.

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eas wrote:
Has anyone compared the Astrolux C8 head-to-head with the Sofirn C8T?

Interested in this as well. Having purchased few Convoy S2+, BLF A6, I am interested in a thrower and would like to pick one of these two. Then, adding BLF Q8 and I am done buying flashlights for a while Smile

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