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: Are these units dusk to dawn or just work all the time?
Document: This is exactly what I was looking for. Perfect product! And it works great every time! I recommend this products.
They work great and even turn on around a corner. We feel more comfortable with the kids upstairs if they need to come down during the night. Our 4 yr. old isn't tall enough to reach the light switches so this is perfect to light the steps at night.
the sensor on these things work surprisingly well. it only activates at night, even tho my hall way doesn't regularly get much light throughout the day, the sensor knows not to activate the light during the day even in the dark hallway.the range and angle of the sensor is also very good. honestly this is the best hallway night light i've come across.now i don't have to step on my dog at night.
This is my second purchase of these lights. They are really efficient.
So far so good with this product. It's exactly what I was looking for and if anything it's actually almost too bright since my cats trigger it every night as they go up and down the stairs and the lights seeps into the bedroom. But, they look great and the adhesive is working fine so far. They are a little bulky but that's to be expected since they need battery room. Very pleased so far with this product.
Just awesome!
I was skeptical about these when I ordered. They came, they are wonderful...easy to install literally took 5 minutes using a tape measure and mounting tape that came with them. I now do not have to hard wire in a light about my stairs. these lights do not stay on where other lights are available. great product.
I have a split staircase with a large landing between the two cases that lead downstairs from a loft master suite. I wanted a way to light the stairs at night without having to turn on the overhead light. These lights have a sleek design and are not too large to be unsightly. I installed the first light at the top of the staircase just below the first stair leading down 7 stairs, the second midway at the landing, and the third just off the second stair leading down 6 stairs.
Excellent. Works as stated and provides plenty of illumination for my stairs. For the price, company should provide batteries with product..
Answer: no