【convoy】Golden S3 available now

[id30209]

@stephenk

Review of the M21C GT-FC40 "here. ":https://www.stephenknightphotography.com/post/flashlight-review-convoy-m21c-gt-fc40 The tint is amazing, CRI is impressive, but the narrow beam angle and floody LED is an odd combination. Will we see the GT-FC40 in any medium sized lights with a shallower reflector?

Neale saud he’s making 7070 reflector for M21B...

[d_t_a]

@stephenk

Review of the M21C GT-FC40 here.
The tint is amazing, CRI is impressive, but the narrow beam angle and floody LED is an odd combination. Will we see the GT-FC40 in any medium sized lights with a shallower reflector?

So far, there is the Convoy L6 (bigger reflector), M21C and S11 (shallower reflector) with GT-FC40.

M21C has store option to choose OP or SMO reflector.

I think L6 and S11 can use OP or SMO reflectors (but not offered normally as a store option, maybe need to order or request specifically).
L6 GT-FC40 comes with SMO by default, whereas S11 GT-FC40 comes with OP by default.

I ordered the M21C GT-FC40 and specified OP reflector (ordered from BG), but what actually arrived is SMO reflector.
I’ve tried ordering another M21C GT-FC40 with OP reflector, still waiting for that to arrive…

[tactical_grizzly]

@Sw1f7

I quite like Sofirns ramping speed in the SP36S, maybe Simon could use the same ramping speed?

Have anyone tested the turbo runtime of the L21B SFT40 yet? I would like to know how long before it steps down.

Would be nice to have a 50, 100 mode for Convoy throwers for extended runtime and lower thermals when using the flashlight for a prolonged time.

How would the thermals of the CULPM1.TG vs SFT40 at 8amps compare, which would run the coolest?

I think at 8 amps the CULPM1 produces ~1500 lumens and Simon claims ~2000 lumens from the SFT40, so wouldn’t that mean the SFT40 is more efficient and therefore runs cooler?

[easyshades]

@texas shooter

@Simon Mao

26800 extension tube for M3-C sample

Thank you Simon. When might we see them for sale?

in black?

[stephenk]

@d_t_a

@stephenk

Review of the M21C GT-FC40 here.
The tint is amazing, CRI is impressive, but the narrow beam angle and floody LED is an odd combination. Will we see the GT-FC40 in any medium sized lights with a shallower reflector?

So far, there is the Convoy L6 (bigger reflector), M21C and S11 (shallower reflector) with GT-FC40.

M21C has store option to choose OP or SMO reflector.

I think L6 and S11 can use OP or SMO reflectors (but not offered normally as a store option, maybe need to order or request specifically).
L6 GT-FC40 comes with SMO by default, whereas S11 GT-FC40 comes with OP by default.

I ordered the M21C GT-FC40 and specified OP reflector (ordered from BG), but what actually arrived is SMO reflector.
I’ve tried ordering another M21C GT-FC40 with OP reflector, still waiting for that to arrive…

Thanks for the info. The smooth or OP reflector doesn’t make any difference to the beam angle, just the hotspot. Pretty sure the L6 (I sold my original, one of the first L6 made) had a wider beam angle, but the L6 is too big for my needs. Likewise, the S11 which would likely have a much wider beam angle, probably doesn’t have anywhere near the output or heat handling. An M21 with shallower reflector would be a great match for 7070 emitters such as the GT-FC40 and XHP70.2.

[Tom_E]

@tactical_grizzly

@Sw1f7

I quite like Sofirns ramping speed in the SP36S, maybe Simon could use the same ramping speed? Have anyone tested the turbo runtime of the L21B SFT40 yet? I would like to know how long before it steps down. Would be nice to have a 50%, 100% mode for Convoy throwers for extended runtime and lower thermals when using the flashlight for a prolonged time. How would the thermals of the CULPM1.TG vs SFT40 at 8amps compare, which would run the coolest?

I think at 8 amps the CULPM1 produces ~1500 lumens and Simon claims ~2000 lumens from the SFT40, so wouldn’t that mean the SFT40 is more efficient and therefore runs cooler?

I've never heard of LED's running any cooler than others, given the same wattage (amps x voltage). So the LED that runs those 8 amps at a lower voltage would be cooler, but the difference won't be much.

Here from the djozz test, the SFT-40 at 8 amps does about 3.45 volts. I can't find a test of the CULPM1.TG (Boost HX), it may be here somewhere, but not sure where. From the datasheet on the Boost HX here, it looks like 8 amps does about 3.45 volts, looking at the Forward Current diagram.

So djozz's test of the SFT40 compared to the datasheet on the Boost HX shows about equal voltage at 8 amps, therefore the wattage is the same, and therefore the heat produced should be about the same, assuming heat produced corresponds with the wattage. Both LED's are spec'd at 6 amps max as well.

If the larger footprint of the SFT-40 (5050) vs. the Boost HX (4040) results in more shedding of heat form the LED, then perhaps the SFT-40 has the advantage. In theory it should help, but it's not that much of a difference.

[JaredM]

Just was about to place an order and see the SFT40 emitter is no longer available???

[JaredM]

@Tom E

I can’t find a test of the CULPM1.TG (Boost HX), it may be here somewhere, but not sure where.

I posted these results in the XP-P thread…

[Simon_Mao]

@stephenk

Review of the M21C GT-FC40 here.
The tint is amazing, CRI is impressive, but the narrow beam angle and floody LED is an odd combination. Will we see the GT-FC40 in any medium sized lights with a shallower reflector?

S11 GT FC40 on sale.
and suitable reflector for M21B is in production

[Simon_Mao]

@easyshades

@texas shooter

@Simon Mao

26800 extension tube for M3-C sample

Thank you Simon. When might we see them for sale?

in black?

there will be silver,gold,red and blue color

[Scallywag]

@Tom E

@tactical_grizzly

@Sw1f7

I quite like Sofirns ramping speed in the SP36S, maybe Simon could use the same ramping speed? Have anyone tested the turbo runtime of the L21B SFT40 yet? I would like to know how long before it steps down. Would be nice to have a 50, 100 mode for Convoy throwers for extended runtime and lower thermals when using the flashlight for a prolonged time. How would the thermals of the CULPM1.TG vs SFT40 at 8amps compare, which would run the coolest?

I think at 8 amps the CULPM1 produces ~1500 lumens and Simon claims ~2000 lumens from the SFT40, so wouldn’t that mean the SFT40 is more efficient and therefore runs cooler?

I’ve never heard of LED’s running any cooler than others, given the same wattage (amps x voltage). So the LED that runs those 8 amps at a lower voltage would be cooler, but the difference won’t be much.

Here from the djozz test, the SFT-40 at 8 amps does about 3.45 volts. I can’t find a test of the CULPM1.TG (Boost HX), it may be here somewhere, but not sure where. From the datasheet on the Boost HX here, it looks like 8 amps does about 3.45 volts, looking at the Forward Current diagram.

So djozz’s test of the SFT40 compared to the datasheet on the Boost HX shows about equal voltage at 8 amps, therefore the wattage is the same, and therefore the heat produced should be about the same, assuming heat produced corresponds with the wattage. Both LED’s are spec’d at 6 amps max as well.

If the larger footprint of the SFT-40 (5050) vs. the Boost HX (4040) results in more shedding of heat form the LED, then perhaps the SFT-40 has the advantage. In theory it should help, but it’s not that much of a difference.

The thinking here is: total power consumed = light emitted + heat generated. If the LEDs really consume the same power, but the SFT40 is producing 33% more light, it stands to reason that there is less waste heat being generated. Now if someone wants to calculate how many watts the extra 500-600 lumens represents, we can assume that the Osram generates that same amount of extra heat compared to the SFT40.

[Tom_E]

I haven't seen it mentioned that higher bin LED's of the same type produce less heat. I wonder if anyone noticed or measured it. So for example a high bin SST-20 6500K truly produces less heat than a low bin SST-20 3000K at the same amps and voltage. Interesting if so.

[ggf31416]

@Scallywag

The thinking here is: total power consumed = light emitted + heat generated. If the LEDs really consume the same power, but the SFT40 is producing 33% more light, it stands to reason that there is less waste heat being generated. Now if someone wants to calculate how many watts the extra 500-600 lumens represents, we can assume that the Osram generates that same amount of extra heat compared to the SFT40.

Maximum Spectral Luminous Efficacy of White Light
:

We find that, depending on the acceptable bandpass and—-to a lesser extent—-the color temperature of the light, the ideal white light source achieves a spectral luminous efficacy of 250—370 lm/W.

Higher output as light in watts means lower output as heat but you can’t generalize that to lumens, because the luminous efficacy could be different. 600lm represents 1.5-2.4W, but the calculation only makes sense if the luminous efficacy of the generated light is almost the same for both LEDs, which would require very similar color temperature, tint and CRI. A greenish tint means higher efficacy while very warm or very cool light would intrinsically result in lower efficacy due to more red or blue and less green. 2.4W is less than 10% of the power that reaches the LED, so the effect shouldn’t be larger.

Edit: The whole article is extremely interesting. If using 100% efficiency light conversion the highest efficacy for a high CRI light source would be around the 3500-4300K range (Fig. 4). Also:

Fig. 8 illustrates the spectral distributions of two lights using similar total electrical power and based on the same
blue LED, but using different phosphors at differing levels of absorption to achieve advertised color temperatures of
3000 K and 6500 K. The spectral distributions achieve luminous efficacies of 341 lm/W and 287lm/W, respectively.
While both lights closely bracket the acceptable Planckian offset, neither have a high CRI—especially the 3000 K
light. The 3000 K light is rated at 86 lm, implying an electrical-to-light efficiency of ηE ∼17%.

[LTC]

Hi Simon, what happened to the product listing of M21C and L21B with SFT40? It’s gone or show out of stock with OP link.

Bare LED for SFT40 gone as well.

Only product left is 3X21A with SFT40.

Edited : 3X21A SFT40 not available too.

[id30209]

Mail call

This thing throws fellas

[zoulas]

Convoy L7 SBT90.2 26650 1320 meters Thrower Flashlight

How come you light does not look like this one?

[Simon_Mao]

@LTC

Hi Simon, what happened to the product listing of M21C and L21B with SFT40? It’s gone or show out of stock with OP link.

Bare LED for SFT40 gone as well.

Only product left is 3X21A with SFT40.

Edited : 3X21A SFT40 not available too.

SFT40 LED is out of stock currently ,it will be available after two weeks

[TIFisher]

@id30209

Mail call

This thing throws fellas

How does it handle the heat?

[zoulas]

Which light is that? The L7 seems to look like the L6.

[PiercingTheDarkness]

Convoy L21B CULPM1/CSLNM1 vs C8+ CSLNM1 (Store Demo)