When I first saw the groupbuy of this flashlight, my thought was: it's nothing special about this light, a single emitter flashlight but not a big reflector/thrower flashlight?
Then I read a bit more about it:
• it uses 21700, I didn't have any 21700 flashlight yet.
• it has 15mm thick integrated shelf with 7 deep heat sink fins, ok so its heat dissipation performance must be very good, I always like something thick and heavy duty.
In addition, I did not have any Fireflies flashlight yet, therefore I purchase both the E01 and E07.
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Manufacturer's description:
• Luminus SST40W N5 5700K emitter with lifespan of 50,000 hours
• Max 2300 Lumens
• Ramping (From 1 Lumens to 1000 Lumens) ; Double click to Turbo 2300 Lumens
• 4 + 1 modes (20lumens>100lumens>500lumens>1000lumens); Double click Turbo 2300 Lumens
• Made of 6063 aluminum alloy
• Body color: Matt Black / Clear anodizing
• Black HAIII Anodising Surface Finish / Clear-ano HAII Anodising
• 1x 21700 / 18650 (excluded)
• 6 degree angle TRI lens
• Toughened ultra-clear glass lens
• Digital current regulation on lower brightness
• IPX6 waterproof
• with Purple switch leds
• Size: 120mm(L )x 34mm(Head) x 26mm(Body)
• Net Weight: 96 gram
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E01 Left and E07 Right
Only the tail side has square thread
20mm star
The driver is very hard to access, cannot pull it out of the head because the thread part is so long
Enough thermal paste
Size compared to other flashlights
Beamshots
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Measurement
• 1514 lux at 5m ~ 37,850 cd ~ 390m throw
• Fireflies advertised that the shelf is 15mm thick, but my measurement shows that it's only 10mm. Still thick but not as advertised.
• MCPCB star is 20mm edge to edge, corner to corner might be 22mm.
• Tail current: around 8A, with fresh Samsung 21700 48G, using a wire to connect battery to flashlight's body. It's lower than I imagined, the contact might not be good enough.
Turbo test:
The flashlight head's temperature at the end of the test is 70C, too hot to hold. Ambient temp is 23C.
I will do some more test and update here later.
[update] I did a second test, 5 mins, 100% is turbo
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.
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Initial impression:
Overall a quality flashlight. The clear version will show more imperfection/machining mark/scratches than the anodized versions. The shelf is not 15mm thick as advertised but 10mm is still very thick, the fins are quite deep so heat dissipation must be good. Driver is very hard to access because the threaded part is very long, it cannot be pulled out of the head completely. My advice is if you don't absolutely need to access the driver, don't pull it out. If you break the e-switch wire's solder joint, it's very hard to fix.
.
.
About Fireflies: I paid extra for DHL express shipping but ended up received the flashlights after 10days, later than many people used free delivery option. Email communication may somtime takes a few day to get a response, this is definitely one of the areas that Fireflies can improve.
.
.
Conclusion: A good 21700 flashlight.
Then I read a bit more about it:
• it uses 21700, I didn't have any 21700 flashlight yet.
• it has 15mm thick integrated shelf with 7 deep heat sink fins, ok so its heat dissipation performance must be very good, I always like something thick and heavy duty.
In addition, I did not have any Fireflies flashlight yet, therefore I purchase both the E01 and E07.
.
.
Manufacturer's description:
• Luminus SST40W N5 5700K emitter with lifespan of 50,000 hours
• Max 2300 Lumens
• Ramping (From 1 Lumens to 1000 Lumens) ; Double click to Turbo 2300 Lumens
• 4 + 1 modes (20lumens>100lumens>500lumens>1000lumens); Double click Turbo 2300 Lumens
• Made of 6063 aluminum alloy
• Body color: Matt Black / Clear anodizing
• Black HAIII Anodising Surface Finish / Clear-ano HAII Anodising
• 1x 21700 / 18650 (excluded)
• 6 degree angle TRI lens
• Toughened ultra-clear glass lens
• Digital current regulation on lower brightness
• IPX6 waterproof
• with Purple switch leds
• Size: 120mm(L )x 34mm(Head) x 26mm(Body)
• Net Weight: 96 gram
.
.
.
E01 Left and E07 Right
Only the tail side has square thread
20mm star
The driver is very hard to access, cannot pull it out of the head because the thread part is so long
Enough thermal paste
Size compared to other flashlights
Beamshots
.
.
Measurement
• 1514 lux at 5m ~ 37,850 cd ~ 390m throw
• Fireflies advertised that the shelf is 15mm thick, but my measurement shows that it's only 10mm. Still thick but not as advertised.
• MCPCB star is 20mm edge to edge, corner to corner might be 22mm.
• Tail current: around 8A, with fresh Samsung 21700 48G, using a wire to connect battery to flashlight's body. It's lower than I imagined, the contact might not be good enough.
Turbo test:
The flashlight head's temperature at the end of the test is 70C, too hot to hold. Ambient temp is 23C.
I will do some more test and update here later.
[update] I did a second test, 5 mins, 100% is turbo
.
.
.
Initial impression:
Overall a quality flashlight. The clear version will show more imperfection/machining mark/scratches than the anodized versions. The shelf is not 15mm thick as advertised but 10mm is still very thick, the fins are quite deep so heat dissipation must be good. Driver is very hard to access because the threaded part is very long, it cannot be pulled out of the head completely. My advice is if you don't absolutely need to access the driver, don't pull it out. If you break the e-switch wire's solder joint, it's very hard to fix.
.
.
About Fireflies: I paid extra for DHL express shipping but ended up received the flashlights after 10days, later than many people used free delivery option. Email communication may somtime takes a few day to get a response, this is definitely one of the areas that Fireflies can improve.
.
.
Conclusion: A good 21700 flashlight.
