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: Is this compatible with LED or CFL bulbs?
Document: This was my first attempt at upgrading a standard switch in a 3-way circuit to dimmable. Works great with incandescent but not at all with CFL/LED. The CFL/LED dimmer is not just a marketing ploy- it actually works much better. This switch introduces a very noticable flicker in CFL/LED when dimmer is less than 100%.
I have another switch in the other room but no dimmer on that one. I hate that PAR 30 bulbs cost about $8-$9 each but there is no high efficiency bulb that matches the yellow and warmth of them. Having them dimmed not only saves energy but prolongs the life of the bulbs. This is the way to go if you are tired of replacing PAR 30 bulbs all the time and you don't always want the full blast of the flood lights on you.
This is a nice looking light switch that just so happens to dim your bulbs. We tried this on the newer energy saver type bulbs and those bulbs always burn out. What has worked well for us so far, is the older type bulbs. We have a 60 watt in our bedroom now. We liked the idea of being able to use half the wattage, no matter what type of bulb we were using. It just so happens we have to use the older style bulbs in order for this to work.
I still give the item four stars due to the fact it does do very well what it does, dim lights. I can only imagine that the energy saver bulbs must use such low wattage that if turned down they dont have enough power to make them work.I have a feeling I will one day find a energy saver type bulb that will work with this switch. The switch by the way feels great and isnt flimsy.
This switch does not work well with LED lights. There is nothing in the product description that states this switch is only for incandescent lights and you find out when you read the warning on the product. I installed it anyway to see what would happen and it did dim the LEDs for a day or two then it failed and would not turn on the light at all. I removed it and ordered a switch specifically for LEDs.
works perfectly with 6 pot lights and a load of about 300 watts.fits in standard switch box, may not work with florescent lights
the Instructions and diagrams provided were not very helpful. Installation was very frustrating. I couldn't get it to work properly and finally discovered that one of the poles was dead - an open circuit even with the switch closed. The other pole worked, but then the dimmer feature died. I missed the 30 day refurn date by a day, so now I'm stuck with a $16 single pole non-dimming switch with an extra wire hanging out of it.
You cannot test these with a meter or a continuity light like a three-way switch, as the triac/diac circuit inside requires AC power to test it.
Works like a dimmer switch should work. No surprises. Hooked it up in the hall so the kids can see to go to the bathroom at night and don't have to have a bulb blazing in its full glory all night.
When turned on, the lights will illuminate to whatever brightness the dimmer is set to regardless of which switch was used. The switch is extremely simple and took virtually no explanation for anyone in my house to be able to use. It even fit into our existing switch plate covers. The only tiny complaint I might be able to make is that the feel of the switch is not very "positive", but more mushy when flipped. Certainly not a big issue especially considering all that it's got going for it.
Answer: yes