Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: how many batteries are required for this light?
Document: They take 3 AAA batteries and it's easier to change batteries in the Mighty Bright (no screwdriver required)than the Energizer. The batteries last a long time too! Furthermore, you can find them with an A/C adapter and skip the batteries. The necks eventually loosen up but no so much it's a pain to use (as is the Energizer).For a few dollars more, you can have a much better product. Go for it!
The battery life is fairly good. I bought a 10 pack of the required batteries and 6 months later I still have 6 batteries left. I read about 2 hours a night. So that's fairly good.4. It looks nice. I like blue.ConsNone really. I kinda wish it took AA batteries or something a little easier to find in a drug store than those little watch batteries.It's recommended. Good, strong light that seems well made. Does what I need it to do.
At first light illuminates the entire room, but after a few weeks of use light became less intense, the design is good and stays in the position required.
The best book light of the very many I've tried over the years. Also doesn't turn on inadvertently when packed for travel!
It's kind of wobbly and doesn't really bend the way you want it many times but it works and the light is really potent
Product works as promised on various equipment. Priced right. Adjustable from many angles. Light weight and not bulky. Appears to be durable at this time.
This is a very high quality book light! It has a very bright light and the clip stays on the book unless you move it. The light is bendable and you can read at many different angles. I love this light!!! !
This things sucks, to put it lightly (I had to, sorry. )It's flimsy, so it's almost impossible to aim the light where you want it. It's cheap, it flickers like a dying fluorescent bulb, which is super annoying and required me to smack it a few times, and finally - it's SUPER BRIGHT. It will keep your cortisol flowing [natural wake-up response to sunlight emitting in the room].
I love this book light, very light-weight, portable, and can be easily adjusted to bend in whichever direction you need it to. There are many book lights available, but I think this one is one of the best.
This is the best little light. Many nights and mornings not wanting to turn on lights...you can read with this little flexible light that centers on just what you want to see. A friend even told me she at times uses it as a flashlight at night. Truly a versatile little light.
Answer: yes