Bright, but they buzz embarrassingly loud when dimming...
593818
Unbearable buzzing sound while they are dimming. 2003-2007 Honda Accord, I own two and they do it in both vehicles in the map lights. Extremely bright, nice build quality, but don't handle the very common dimming feature in a VERY common car, most LED'S in this price range do. Fine for the doors or the trunk if no dimming is involved.
4409474
I gave them one star because they come on. They work. And that should be enough for 5 stars for a light bulb, right? Wrong. These 40W equivalent bulbs make the most obnoxious buzzing noise when they are on that I have removed them from the fixture and thrown them away (missed window of time to return). I tried them in other fixtures thinking maybe it was the lamp instead of the bulb that was the problem, but it was definitely the bulbs. All of them. I bought some 60W equivalent (9w) bulbs from the same company and they work fine (albeit they are super bright - more like 100W equivalent). But at least they don't make a noise that drives everyone insane. I would not recommend these bulbs. Try a different brand for this wattage.
57715
These bulbs are terrible! They make so much noise it would drive you crazy. I took out non-dimmable LED's to replace with these and besides being buzzy don't even dim as well. Sending them back!
4939869
Nice and bright in in a regular outlet. Buzzing and flickering was too annoying when attached to a dimmer, but that could have just been the dimmer I was using.
1918331
These bulbs are VERY bright. They say 40 W lumen equivalency, but they are painfully bright in my bathroom vanity. So I went to Lowe's, and stood for 30 minutes trying to find a compatible dimmer. According to the product details, the Lutron DZVWCL-153PH-WH is compatible.
NOT SO! As soon as I turned them on, there was constant LOUD buzzing, even when the bulbs were not dimmed.
Unfortunately, I bout two six-packs of bulbs and the dimmer set me back another $25 dollars. So now I'm out $85 and I have to find a new solution. I also thought maybe there was just one or two bulbs might be defective, so I unscrewed them all, and screwed them in one at time. Every single one buzzed. All eight of them in one bathroom sounds like a nightmarish beehive.
420402
Using incandescent bulbs, there is an annoying and noticeable hum anytime the lights are dimmed.
2310323
Stunning bright light and a nice long cord. However, there is a VERY audible hum/whirring noise when the power is switched on.  I bought this to make a faux neon sign to have on in the background while filming YouTube videos, but the sound is picked up on my mic. Bummer.
4186767
They do the job, as advertised, but they are noisy. With the TV on, it's no big deal, but you can definitely hear a thing hum from these bulbs, dimmed or at full strength. Not enough to return them, but noticable.
4492223
The color from these lights is great, but they buzz!  Before buying all 8 bulbs that I needed for my bedroom I bought a single bulb to check for buzzing. That first bulb worked great (no buzzing)! But there are certainly a few that buzz more than the others.
1340145
Conflicted.  The color on these is awesome, and they dim as close to an incandescent as I have found.  They just have really excellent color characteristics.  The poor rating is because they hum something fierce.  I had them on a standard Lutron AY-103P dimmer, so I switched to a LED-compatible Lutron TGCL-153PH dimmer rated for up to 150W of LEDs (I have 66.5 installed).  They still hum just as badly.  The switch specifically states it is suitable for Phillips BR30 LEDs.  I had checked the Phillips website for compatible dimmer info but their info is YEARS out of date, which is ridiculous considering how fast this stuff is changing.  Phillips needs to up their customer support for their products.  Maybe I bought the wrong switch, but it shouldn't be this damn hard.
1225562
The light is great, the buzzing from the bulb not so great.  Beware of using this bulb with a Lutron dimmer switch.
725582
I bought these because they're daylight colored, which I prefer. Installation is cake, and they work as advertised. I did need to upgrade my dimmer to an ELV because with the less-expensive model buzzed. Note that this also involved upgrading the switch run to a 3-wire run, so bear that in mind if you choose these.

My only problems with these are twofold. First, they don't sit flush with the ceiling. I tried a number of solutions, but I just can't get them to sit flush. Still, I can't blame these lights 100% because I'm using terrible Halo cans which are the only retrofit cans I could find that fit in my ceiling. The bigger problem is that the torsion spring just popped right off. Thankfully I had glasses on because it could of taken out an eye! The way these springs attach is dreadful, and they don't survive being removed many times.

Aside from those issues, I love the lights. They dim well, they look great, and on full brightness they really light up the room.
3566367
The lights themselves look very well built and substantial but the flickering / blinking when dimmed on my new GE Z-wave dimmer switch is enough to drive one crazy.  I was able to lessen the flickering by adding one 20w incandescent bulb. However the "humming" when dimmed is also very annoying.
3601953
used these in an old kitchen remodel, worked well. They make a light buzzing noise when used on a dimmer switch
759169
These bulbs work great, in one setting.  They light up no problem and like any light bulb are easy to insert or replace.

However, these are dimmable. This is fine, it means it works well with a dimmer which I do have. But they do not dim! They turn on or off, and they don't flash when off like most LED lights that are not dimmable, so it is usable, but they do not adjust their light settings.  I reduce the power, the light is the same.  Reduce more, same.  And more...same.  When I am finally down to 50% it drops a touch.....very slightly, but you can see the difference at that point.  Literally, 60% is full blast and 50% is just under full blast....about 95% luminosity. Drop it down to 20% and it drops another notch, maybe 90% of it's maximum luminosity. Then 10%, no change, and off....where it shuts off. So I can have it at Off, 90, 95, or 100% power when it should light up at Off, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100%

So, I purchased dimmable lights, only to get lights that work with a dimmer but do not actually dim.
4211767
At full brightness the bulbs are pleasing.  When dimmed, they take on a ghostly blue/green hue... not pleasing at all.  I'm switching back to incandescents for my chandelier. Also, these bulbs are very dimmer sensitive (see vendors notice), so I did have to change out my old dimmer just to discover how much I dislike these new bulbs.
4406905
Dimming is unworkable. Light fixture becomes disturbingly noisy with even the slightest among of dimming. These bulbs are unuseable.  Had to revert to previous halogen bulbs.