Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Can you use a concrete cement instead of screws
Document: Half of my lights quit working after a few days of use. Unfortunately they where a gift to someone and I didn't find out they didn't work till months after...
Received the lights on time and left them to sit out overnight to charge, which they did with no problem. My problem was trying to screw the provided screws into my Trex decking. Right when I was almost all the way in the tops of the screws just twisted right off. The lights seem to work fine but they are a little flimsy. I will buy more to maintain aesthetics, but otherwise would try another brand.
they fit my unusual porch steps well. the light they give out is more than adequate and I get positive commentsabout them.
We put these on the walls around the pool area and they are better than we expected. Easy to mount and put off the perfect lighting as well.
This was the first bad purchase I've make on Amazon.I will be returning the lights.Only two of the nine would charge and turn on.And the two that turned on were so dim they were useless.Recommend you not buy them.
They don't work after a couple of cloudy days. I expected them to hold a charge longer than that. Not dependable.
These were exactly as pictured. I like the size of the lights. I put them on my steps in the morning and they lit up nicely that night. Exactly was I was looking for. Would highly recommend.
These lights did everything promised and look great on the steps. I especially like the fact that you can change the batteries. Highly recommended.
These lights attached to the steps easily and offer a soft yet just right amount of light for each step. They do not overpower the backyard with light. I love the fact that in the winter time when we do not spend as much time outside, we can turn the lights off and save them. I would very much recommend them for step lighting.
These guys light up my back steps so well. They were easy to install, easy to replace batteries and do exactly what I needed them to do.
Answer: no