Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: How long should I change the light?
Document: This light is pretty good. It's a bit difficult to use left-handed, though. The light is very bright and I can see quite a distance. I'm still on the first charge and I expect it will last quite some time.The ONLY change I'd make with this light:  It needs a hand strap.
For an emergence light this fits the bill. it is bright and cast it's light a long way. I keep mine in the car.
I purchased this for a Christmas gift. A well-made product and very strong and long-lasting light. This is a handy light to have on hand to check on nighttime noises.
However, I am very satisfied with the overall function of this light as well as the design. If you're looking for a light that's very bright and runs for a long time for a spot light, this is the one for you.JQ
Bright led light it will shine at less 300ft an more light weight an comfortable to the hand wish it had a lanyard long lasting battery best spot light I have seen so far love this light.
The part where you put the  adapter/charger into broke the day I received it! Bought another one and the spot light works great! Best one I ever had! Love it!It has a very bright light and the charge lasts a long time!
The light itself is bright and does the job. But the charging port is poorly designed and broke the second time I used it. Unfortunately, because it does hold a charge for a long time, it was out of warranty when it broke. So now I have to take it apart to charge it or contend with wires hanging out of it when using it.
I purchased this for use while checking pasteurs and fences. It's been a excellent light with surprisingly long battery life. It has a far reaching but not overly arrow beam. I used it this past weekend while caving. It am buying another tonight because my friends keep trying to claim mine!
Impressed with how bright this light is. I agree with other reviewers. The switch to keep the light on is really too loose and easily engages/disengages. I read the instructions and did an initial eight hour charge. The instructions do not say when to recharge the unit and for how long so I contacted Dorcy customer service.
I like the spotlight very much however there are 2 problems that I do not like about it. I am a female and the weight of the light is actually hard for me to carry for long periods of time as it makes my wrists very tired and sore. Also, the lock is too loose and many times will either lock or unlock on its own....this aggravates me. However the light itself is excellent and allows you to see for great distances.
Answer: yes