Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: My 1000 watt ballast seems to be getting dimmer so I changed the bulb still dim,what is the likely problem?
Document: When the unit cools, the switch resets, and the whole process starts over again. The unit does not have trouble light to indicate that there is a problem, so the average person wouldn't even know what was going on until whatever they were growing started not growing well or worst, they have a fire.Quantum 1000 Watt Dimmable Electronic Ballast
I have heard bad bad things about this ballast and my local hydro guy tried to return all he had because he had 5 come back from one guy that had problems firing the bulb and others with the same problem. But I got mine from him for $100 and never ever had a single issue with it. I flick that dimmer switch all over depending on use etc...I have a Hortilux Dual Arc Super Blue bulb in it and have used the generic HPS bulbs and never any problem.
I ordered the ballast , it arrived a day earlier than the estimated time. It came in a factory sealed box, inside a plain cardboard box. Although I ordered a bulb as well, it was a very discreet package(thank you for that).The hortilux bulb i ordered came inside the same box.....everything seems legit as of this review. I will follow up in a few months.I would buy from this place again , as of today.
Ive ran the old ballast of every sort until now, I paid 3 bones($300) for this tow years ago, and have been using it since june, so 8 months, almost, for the summer, I was using the 750 watt setting be ause so hot with 1000 watt setting, but using the valuline 435 cfm fan and inline reflector $29 ebay, this is my favorite set up ever.
I have a 600W Quantum ballast which I like and this 1000W unit appears to be quite similar. Note to prospective buyers from this vendor: they put a shipping label on the original Quantum packaging and sent it like that. No problem protecting the unit but if you need discreet packaging this isn't it.
So far so good on this ballast. I have purchased several ballasts over the years. This brand has been one of the best so far. I have another one which was purchased over a year ago and it is still going strong. If I have the same results with thus ballast, I well be quite pleased. I would recommend this item to others in need of a light ballast.
I saw my bill go down about 30% by switching to 2 of these ballasts they are definitely worth the extra money. I will always stick with quantum. the dimmer is great for when you have to work and don't want to die of heat.
Works like advertised. I have never had a problem with it. I am definitely satisfied and would recommend it to friends.
IVE' NEVER SEEN ANYTHING SO DAM BRIGHT IM USING A  MOVING LIGHT TRACK  AND I HAVENT HAD  THE GUTS TO KEEP ON 1000 YET.THIS LIGHT WILL SAVE A LOT OF POWER.LOWER SETINGS, ALSO A COOL TUBE WORKS BECAUSE IT WILL KICK HEAT WITH THAT MUCH POWER.THAT BEING THE BULB BALLEST RUNS COOL.
I bought this last year for a Christmas present and I'm going to buy another one this year :) No problems what so ever !!!!! This is a Great Ballast !!!!! !
Answer: yes