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: this is led lights ?
Document: These lights are light weight and easy to install. It uses a much smaller battery than the previous ones we used in the past.
The exit lights have worked out great.. Would purchase again when needed... Very happy with the price and quality.. Would recommend to others..
I purchased these lights for our golf course for we have failed safety inspections and these passed. Very easy to install with ease, Great buy
Simple to install and everything worked. Lighting is a little on the light side as in dim. I liked that the lights and sign are combined in one. Taking up less space.
When maintaining our office building I'm always looking to make the building safer for customers and tenants.I purchased these combination lights for updating our emergency lighting system.
I had to buy 12 new exit signs for our nursing home and It can get very expensive. I am very happy with these exit signs. First off you don't have to worry about bulbs burning out since these are all LED and because of this the lights stay on much longer when the electricity goes out. These were about 1/3 the cost of other lights at a local store but I couldn't be happier and the health department and fire department said they were up to code. So we are very happy
as described, it works after it was installed and is still working and expect it to keep working for years
This is a great product. Everything work as expected. The only reason I gave it 3 stars is because the instruction was poorly written. It does not tell you where to hook up the battery connector and the connector was not in an obvious location.
This exit and emergency light combination is an excellent choice to locate in a tight area. No need to use more wall space to add a light or exit sign. Also no need to run more electric service to power it.
There was no wiring diagrams for proper installation. Very vague information which makes proper install very tough especially if there not experienced in installing ac current electrical circuits
Answer: yes