Combo: Acebeam K75 Long Throw Search Light - 6300 Lumen, 2500 Meter throw with 4x 18650 batteries

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Combo: Acebeam K75 Long Throw Search Light - 6300 Lumen, 2500 Meter throw with 4x 18650 batteries

Combo: Acebeam K75 Long Throw Search Light - 6300 Lumen, 2500 Meter throw with 4x 18650 batteries

RRP: £99
Price: £9.9
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Description

Turbo in POWER mode with and without ventilation (10 min.). It seems from my test that the two curves are similar and that the descent is timed.

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The Acebeam K75 is powered by four 18650 cells. Four are required, and they fit into the cell holder below. This gets a little interesting. While doing my lumen measurement I couldn’t get past 2xxx lumens, so I had to read the manual. Something that men don’t do, right? Below is a photo taken in Turbo ECO mode at 3000 lumens. The house is located at a distance of 446 meters. Long Press: 1. When the light is ON, long press the switch to cycle from Low-Mid1-Mid2-Hight, loose the switch to select the mode. If you enjoy carrying a 1+ kilogram flashlight in your hands, you are tough. You could, however, use the lanyard to carry the light around. You know, just to relax those tiny muscles in your wrist.There’s a massive stepdown to over 2000 lumens on the highest Turbo (POWER Turbo). Kind of expected – this mode creates a lot of heat, and that has to be managed. The tests were done using the "new" batteries supplied with the torch (18650 Li-ion ARC18650H-310A 3100 mAh) charged at 4.18V. I also used a small fan to see the pattern of the discharge curve in conditions of forced ventilation. There is no real warning, except for the Indicator LED on the side of the body. This started blinking at Acebeam K75 Throw measurement If the battery falls below 11.2V, the light will shut off. Since these 4 cells are in series (and also why the light requires 4 for operation), this means the light should shut off when the voltage is around 2.8V per cell. This is well within the acceptable range.

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Finally the complete graph of the tests done including the HIGH level (2500 lm.) In POWER mode without forced ventilation. ECO, K75 трябва да бъде оборудван с 4 x 18650 батерии с висок ток на разреждане, които могат да отдават поне 10 ампера ток. One more power-related feature is the power indicator, somewhat beside the switch. When the light is on, this indicator is on.

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The battery tube has a great amount of knurling so it isn’tslippery at all. Another great characteristic! The second-highest output (ECO Turbo) is almost perfectly regulated and heat never becomes an issue whatsoever. This is very good, and it makes the two-mode groups a smart addition. And while on other lights with this UI (TK16 for example) I’d probably skip the ECO, on the K75, I’d probably just always leave the light in ECO. That way, for every mode available throw will always be its maximum. That is, on any mode, at no point will the light step down and give you reduced output (ie reduced throw). For reference, here’s a baseline shot, with all the room lights off and almost nothing hitting the sensor. Also, here’s the light with the worst PWM I could find. I’m adding multiple timescales, so it’ll be easier to compare to the test light. Unfortunately, the PWM on this light is so bad that it doesn’t even work with my normal scale, which is 50 microseconds (50us). 10ms. 5ms. 2ms. 1ms. 0.5ms. 0.2ms. In a display faster than 0.2ms or so, the on/off cycle is more than one screen, so it’d just (very incorrectly) look like a flat line. I wrote more about this Ultrafire WF-602C flashlight and explained a little about PWM too. User Interface and Operation The problem with doing this is the difference in the opening of the Integrating Sphere. The Convoy S2+ shows different numbers depending on the size of the opening in the Sphere. The K75 uses a much larger opening. So I used the same opening to measure both lights. The Acebeam K75 flashlight is a 18650×4 dedicated thrower with a Luminus SBT-90 Gen2. Read on for some thoughts and testing!

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The non-slip knurling on the body of the K75 is rhomboid in shape. Good quality of the writing as good is the quality of the well-lubricated threads.Turbo drops at 2 minutes. From then on there is a stable output of 2500 Lumens till it dies at 1 hour and 43 minutes. Acebeam claims 1 hour and 45 minutes, so this is not far off at all. I will assume that all the other numbers are correct. POWER MODE There’s only one body here but there are two emitter options. There’s the LUMINUS SBT-90 GEN2 (WHITE) (seen here), and the LUMINUS SBT-90 RED.



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