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: How many lumen does it provide?
Document: I currently am using this lamp ro provide additional, temporary light for a terrarium, but it's portable design will make it useful for many things. 3 alkaline batteries last quite a longs time as well!
These have just been the handiest lights for so many things. Batteries last a long time, great lighting, lighweight and convenient to use.
Makes me wonder why so many modern gizmos use those foolish little AA cells that cost a mint and last a minute.
There are many good deals available at Amazon but the duds are starting to cancel out any savings we may be getting from the good ones. For me, the duds have mainly been from third-party sellers. No more 'Next Time...' this time! Done!
From the other reviews it sounded like this would be bright enough for me to read in bed by. Even with it right behind my head I can't get it aimed directly enough to provide enough lightto supplement my nightstand light, let alone work by itself. I was also hoping it might bebright enough to lighten the bedroom up a little, but it's just too dim.
I thought from the picture that this would be ideal as a reading lamp during power outages (which are frequent here). I certainly did not expect it to provide the type of light that a desk lamp provides, but I expected to set it on a chair-side table and use it for reading for limited periods of time. Unfortunately, the neck is so short that there is no way to angle it correctly for reading unless it is placed on a tall table beside the chair.
Now I just keep it close by and if I need to get up, I grab it and use it to light my way so I can go read.I recommend this as a night light, but it's not suitable for tasks where you need to be able to have an area well lit.UPDATE:  I am changing this review from 3 stars to 2 stars. My reason is because of the battery cover. It does not stay securely closed at all and has come open on many occasions.
I won't repeat the shared observations of so many before me, but will emphasize that this product has a very nice light switch sequence, a nice adjustable neck at perfect height, and a PERFECT sized beam, on low or high, for my 17-inch laptop keyboard. Also, the light has aesthetics that match my black and silver HP and, so far, a good battery life as I have been using it continually for a few weeks, sometimes for 8 hours at a time.
works well. needs D batteries, not included  if you are looking for something that is light and portable and illuminates well this would be a good choice
while the price is right and the light works ok the battery holder is weak mine broke when I knocked it over
Answer: yes