Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: dose this need to be hard wired or dose it plug in? How difficult is the installation?
Document: Its motion-sensing electronics are not very robust -- the sensor failed completely less than 9 months after installation. And when you need a light that works right now for guests arriving after dark, a 10-year warranty isn't of much value. Give me a product that works, and continues to work as it should. I'm not much impressed by Heath Zenith "quality".
This fixture was as described, very simple to install, what I did was position the lighting housing and sensor before installing the fixture. Don't know if it makes much of a difference but I thought it did, this way after installation you would have to make only small adjustments with positioning. Same for the sensor. The fixture fitted right on spot where the old lamp was, all that was need was connecting the wires and securing the fixture. Adjustments to the settings are quite simple. Good Product, very sensitive.
This is a very good motion light. I have the light over my garage door and the wide angle sensing will turn the lights on when I step out of my front door onto the front porch. I like the twin light system too, don't need to turn on the porch light. Good buy at the price.
I purchased this item, despite the reviews, because it was to replace the exact same model which I installed approximately nine years ago and never had a problem with until it failed recently. I installed this item and verified proper installation. Everything worked but the motion sensor despite numerous adjustments.
These are very bright,photocell works properly,well packaged,arrived on time,easy installation(everything needed included).Lit up my whole backyard(I got the halogen equivalent of the par38 120v bulb,just as bright-more efficient)Nice finish also,matched my other outside fixtures.I would recommend these strongly.Go Bruins!! !
The unit I purchased was incorrectly wired internally. It fed 120v out the neutral (white) line when properly connected to a hot source. The quality control for this company is clearly lacking.
Bought two of these units for 180 degrees motion detection. Cheap, cheap, cheap.1. Installation instructions were weak.2. Materials were very cheaply made.3. Lamp shields were so thin that they were impossible to install without distorting them...I used four shields to get a fit adequate for two to stay in place.4. I returned both units for two Heath/Zenith DualBrite 270 Degree Motion Sensing Flood Lights, Bronze at an upcharge.5.
These lights work okay, however, it seems the sensing is hard to set. One must be almost directly under them to have them go on. We've tried to set them so that they  have a bigger range over a parking lot, but have not been very successful. The light itself is great when it is triggered to go on.
my light will sometimes not turn off at night as it is set to after a few hours. Othertimes, it stays on all day when it is supposed to only be on a few hours. Frustrating.
came on time, works well. no problems at all. Pleasure doing business. Looking forward to next time doing business together.
Answer: yes