Cree Q5

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FAQ about Cree Q5

LED Flashlight Question? Hi I have a Flashlight with a Cree Q5 LED bulb and it supports .7V-4.2V and I was wondering if it would be brighter if I put a rechargeable Li-ion 14500 battery. Right now I'm just running regular Duracell AA with 1.5V. Would It be brighter if I bought the 14500 batteries? What brand should I get if I wanted to purchase the 14500's? The flashlight is advertised at 230 lumens but it only uses one AA so I dont think It can reach 230. But if I buy the 14500 would that maximize the light output? Thank You If the driver can handle it, it should be significantly brighter.

Difference between lux and lumens? Hey everyone. I've been wanting to purchase a flash light. I'm a bit confused though. So far all the flash lights I have taken a look at measure their brightness in lumens, like this one for example: http://www.dealextreme.com/p/ultrafire-u4-mcu-cree-q5-wc-3-mode-230-lumen-led-versatile-flashlight-cr123a-18650-18500-aaa-17401 And this other flash light I found has a different measurement. I don't understand it. http://www.dealtoworld.com/reviews-12479-50767-Bright+flushlight.html The output is 85 lumen...? This flash light is a lot better than the first one, so I'm a bit confused. Could someone please explain me how this stuff works? Also, if you have any idea how much lumens the second flash light might be, please let me know. Thanks everyone. From Wikipedia
Lux versus lumen
The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. A flux of 1,000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1,000 lux. However, the same 1,000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.
Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12,000 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area to the same level of lux requires a greater number of lumens

Best flashlight for me? I want a flashlight that has a far throw and has to be led.I have narrowed it down to these three choices, http://bestofferbuy.com/Aurora-AK-P7-5-SSC-P7-C-8-Mode-Memory-900-Lumen-LED-Flashlight-with-Assault-Crown-(1*18650)-p-14154.html?currency=USD&utm_source=gbase&utm_medium=cse&utm_campaign=gbase , http://www.dealextreme.com/p/ultrafire-wf-502b-ssc-p7-bin-c-5-mode-800-lumen-led-flashlight-1-18650-39737 . http://www.dealextreme.com/p/aurora-wf-800-q5-1-mode-cree-led-flashlight-7-4v-17v-8686 I'm sorry but I didn't check your links...I've been boned too many times for checking unknown links...
I've recently purchased a Mini Maglite that is a 2 "AA" cell LED flashlight. I've been very happy with this flashlight. It has the rugged dependability that made Maglite famous, and the brightness out of the 2 "AA" batteries rivals that of my traditional 4 "D" cell Maglite.
The one feature that SOLD me on this flashlight was the use of "AA" batteries. I've had LED flashlights in the past that require fancy lithium camera batteries that are extra pricey and hard to find....not a fan. You can go to just about any convenience store and pick up some AA's though.

Which type of hardware is better...? WHICH TYPE OF BULB FOR MAKING A FLASHLIGHT IS BETTER? I mean that in terms of luminosity (which one shines stronger & farther)... Is it the Cree Q5 LED bulb, or is a Xenon 9V/1.2A better... I am trying to make my own flashlight, but I do not know which one has a stronger capability for "blinding someone" (not my purpose---i said that just to explain the actual strength of the bulb/lamp) Thanks to all answers.. and please can anyone just explain to me what Cree or Q5 or what any of that means? THanks everyone I did some looking, and the Cree will provide between 175 and 275 lumens, whereas the xenon will provide somewhere from 230-300, but it is using 1.5A according to what I found, while the LED would use 1.0A. I would recommend an LED because they use less power and last much longer, and are more rugged. Cree is a manufacturer of LED's and Q5 is a model name.

Is this a good bright flashlight for camping? CREE Q5 LED 260 Lumen Flashlight Lamp Torch UltraBright Im in BSA and been in it for bout 2-3 years now. Im looking for a better flashlight. The CREE Q5 LED 260 Lumen Flashlight Lamp Torch UltraBright is made by "Surefire" (as it says). Please help! You certainly picked a bright light. One problem with such a bright light is that it will not last long. In some of the specs I saw it would run for 4 hours on the battery. That should be enough for one night out. If you are out two nights you may run out of power.
I have not used the Surefire brand. It certainly is expensive at $ 50.
I personally prefer a headlamp. With a headlamp I can work with both hands. I will use a headlamp even when I am not camping.
I would recommend two flashlights One would be a 30 lumen or less headlamp for around camp. The second would be a 90 lumen or more light, for emergency travel at night, or just for high power.
It is good to take a medium power flashlight camping. If you need to head home in the middle of the night because of an emergency. You do not want to use a small pen light that does show things in your path, or the lack of them like a cliff. The web site below recommends 30 lumens about 1 watt, for walking on a trail. Tactical / military lights start at 90 lumens or 3 watts. Yours is very bright at 260 lumens. That explains the short battery life. You need a light that will last till you get back to the trail head, while traveling at night.
Maglight makes good LED flashlights. I have a 4 D - cell battery 3 watt Maglight. I tested it an it ran for 27 hours on alkaline batteries. They also make a 2 and a 3 D-cell flashlights with a 3 watt LED bulb. LED is the way to go, it lasts 10 times longer. The Maglight is less expensive than the CREE Q5. Maglight has good quality. Brinkman also makes good flashlights
I have had bad luck with Princeton brand and Gerber brand of flashlights.
Enjoy your camping.

Cree Q5 is from category: Flashlights.