Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: how come in uk the same flashlight is 800 lm and in us 1000 lm? To get 1000 lm do you use special battries?
Document: how do they come off upping the luminous of a light rated at 800 lm to over 1000lm that's bull poop the practice of over rating  of the light power  out to bring trouble to the one claiming it!
I have an 800 lumen flashlight and was excited to find this one at 1000 more lumens at $18.98. Upon receiving it, however, I was totally disappointed. It is much dimmer than my 800 lumen one. I had intended to use it to see on a bike, but I don't even find it safe to use it for being seen. When I turned it on at 'high' on my bike, pedestrians walking around didn't even notice.
The maximum brightness of an XML-T6 emitter is 1000 lumens rated by Cree and the nominal brightness is 800 Lumens so unless this is a magic light it is not possible to get 1800 Lumens out of an emitter that's max output is 1000! I've been selling flashlights for over 10 years and build my own and can say with confidence that this light puts out a max of 5 or 600 lumens max if you're lucky and have high amperage batteries.
Yes, It is a T6 Led but is it 1000 Lumens? Not sure about that. Don't get me wrong, it's bright, but i don't feel that it competes with other 1000 lumen lights. The zoom feature is great for spotlighting things in the distance. It does last forever on one 26650 battery! I have yet to try it with AAA batteries but it does come with an adapter for them. Great little light for the price. Only complaint is that the zoom mechanism does make some noise when operated.
I ordered the light when I put a 18650 in, it worked but no where close to 1000 lumens more like 200 lumens coco fed inc is sending another one. the AAA Battery holder fits so loose you need to get a pvc pipe to go around it so it will work or it will just shack around the 18650 battery comes with a holder and works ok but yet again no where close to 1000 lumens so I put a 26650 battery in it 5000 mah and still did not come close to 1000 lumens.
This LED flashlight works great & allows me to use a variety of battery sizes. It works well with standard batteries & special batteries spelled out in the flyer that came with it.
I am very pleased with the Ultrafire 1000 lumens flashlight. It seems to be very well made, and it is particularly handy in that it is able to use three different type batteries.
If you have to carry a flashlight, this is the one to have. I have had several technicians give me their opinions on this flashlight after I bought it. Everyone that uses it is very impressed by the brightness, the zoomable pattern and the durability of it especially the switch. I use it for a light on my tool belt and as a backup for my headight when doing outdoor activities. Although I would say it is not really 1800 lumins, more like 1000. It is the brightest flashlight ever.
Small enough to fit in my pocket, yet powerful enough to light up the whole house. I like that it floods or zooms to an intense spot. One thing I don't like, is that all these CREE lights seem to come with five modes. I would prefer a switch that allowed for single-mode of brightest only or off. I don't like having to cycle through all the modes to get back to the bright.
Its an inexpensive flashlight, but the zoom is great. Its very bright, just like most other flashlights in this $10 class. The thing that I dislike is that with triple-A's, eventually the battery's get used up and the brightness fades. Because it is so bright, you might find yourself buying new triple-A's every few weeks or so. I have to try one of the other 2 battery's that you can use with this light.
Answer: yes