Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: sure it's waterproof?
Document: it works perfect, but i dont think it be 2000 lumens, and also i dont know if it is waterproof, but i dont think so
These are bright. My brightest flash lights yet. Can use regular AAA batters (need 3). They shipped quickly from overseas. no instructions, but easy to use. Button modes (bright, medium, low, strobe fast, strobe slower, off)  and zoom with the light bezzle. I'm not sure if it's 2000 Lumens, but it's brighter than my LuxPro LP600 which is 800 lumens and also an excellent light
Very durable casing and very bright IF its on the right setting. I would give this thing a perfect score but I'm not sure why it has two dim settings (you know the kind your current flashlight gives you, why IDK) and two strobe light settings (why do I need a flashing flash light) as well as your bright setting. If your looking for a super bright flashlight, this is a good choice but there may be better choices (without pointless settings).
I found that the waterproof design is flawed because there is no O-ring that keeps moisture and dirt from getting behind the crystal and reaching the LED where the threads for the cap are and where the crystal contacts the inner ring of the threaded cap. I will try to find some O-rings and make my lights as water/dust proof as possible. One more design flaw, if this light is to be used with a high recoil rifle or shotgun the battery pack rattles in the flashlight housing.
too big of a flashlight I really didn't like it.feels like its made in China cheap.well looks like too good to be true usually it is
on-off switch broke after apporximately 100 pushes (maybe 3-4 days) I repaired it myself and it didn't remember last setting when turned back on, always goes to next of the 5 possible settings but it is powerful and I am useing it. it can cast a beam 60 yards
it's like 200 lumens if that. seems flimsy. returned it. get something better. no good no good no good no
i very much like the zoom parts. i think 5 options  is a bit much. brite, and flashing would do.
great light very bright and great size,I have used it a lot and have not had to replace the batteries yet
awsome light is like a car head light, lights up the whole street when I walk my dog.
Answer: yes