Review by Jeff Lindborg:

I’ve read a number of reviews on dimmable CFBs and went ahead and just got the 4 pack of the ULAmerica bulbs to try out. I’ve put them in two recessed lighting cans hooked to two different dimmer switches and one of my 3 way lamps for testing. The short version is they are somewhat whiter than I had hoped, but not terribly so – compared with the 100 watt Sylvania can lights in there it’s about as bright but somewhat whiter, not as soft. It comes on quickly as opposed to other CFBs I have around the house that take several seconds to “warm up” and get to full brightness.

You _can_ hear it buzz, however, which is a deal breaker for me. At full power it’s fine but once you kick down to a lower level it buzzes in all fixtures I tried it in – not terribly loud and much quieter than others, but I can hear it when I’m in a quiet room (which I often am) – if the TV were on or pretty much anything else making noise you’d never notice it but for me it didn’t cut it. Also, at very low power it starts to “flicker” slightly – which you should probably expect with fluorescent. This only happens on the “full slide” dimmers I have, not in the 3 way – you have to get it pretty low before it’s a problem.

So long story short, depending on how far away the light is from your ear and the “noise floor” in the room, these may work. For high ceilings in recessed lights it’d be fine – but for close lights where you might be reading or working, you’ll probably hear them humming when not at full power.

Review by J. R. W. Pinzon:

I was suspicious about this product, since the seller was not amazon and there were no reviews available. I wanted to change the lights in my apartment to be “green compliant”. I mean, to save energy and maybe some money in the long term. It was not possible to get dimmable fluorescent light bulbs in the main stores like: homedepot, menards, jewel…

I have had them for 2-3 months now and no regrets. They shine as a sun. They are better than the no dimmable light bulbs that I bought at the store. And yes, they are dimmable and they work.

The only thing could be the delivery, that takes a time. Although the seller will send you an email confirming the purchase and shipping date, I was not able to track the product. However It arrived. Order them but expect them to arrive 1 -2 weeks after (in the worst scenario). I should not be an issue if you are not in a hurry.

You won’t be disappointed.

And, of course, you will contribute to save our planet.

Review by T. Higgins:

I was impressed with the price of these bulbs, and the reviews were mostly favorable. However, I have not been impressed with these bulbs–several have died. Specifically, one was DOA and had to be replaced by the seller. Furthermore, after precisely 8 months of use 3 bulbs in different fixtures all died separately over the course of one week. I have also not been impressed with the consistency of brightness and color temperature–there is marked differences in both among bulbs. In addition, the bulbs do buzz when dimmed, but I have not had problems with flickering bulbs. I would suggest passing on these.

Review by smoothblues:

These dimmable CFLs work very well with Insteon dimmers. They start up at very low brightness (5-10%) and dim all the way down to the lowest level. Insteon dimmers use high quality electronics that create a clean output signal. Alot of people who complain about buzzing/flickering are likely using cheapo dimmers which use triacs. Triacs and similar circuits do terrible things to the AC waveform, chopping it to pieces instead of reducing the amplitude and retaining a sine wave. Incandescents tend to absorb the noisy output of triacs better, so people don’t realize they’ve bought crappy quality dimmers until they use non-incandescent lights.

Color temperature is good, leaning towards the warm side and not the colder bluish temperatures that some people dislike. I’ve noticed a pinkish bias as the lights dim down. Under a shade or cover it’s not noticeable at all. If you are lighting with the bare bulb it may be more noticeable.

Excellent value @ prices from Amazon sellers. You’d easily pay 4-8x as much per bulb at Lowes or Home Depot which have very limited selection of dimmable CFLs.

Review by R. Blauvelt:

I bought four of these to use in wall sconces operated from a dimmer switch. Unfortunately, the one I opened buzzed loudly and flickered wildly, no matter how the dimmer was adjusted. WattBuster’s customer service was quick to authorize a return. They indicated that these bulbs don’t work well with all dimmer switches.

Review by Rod Begbie:

I bought these for the dimmer in our bedroom in September 2006. They made a horrible buzzing sound, even when at full brightness, and flickered distractingly when dimmed.

I’ve since found the “Harmony Dimmable Spiral” DS-20W lightbulb which works a treat in all my dimmer-switch sockets. I highly recommend that over this model.

Review by tgstm87:

I ordered 5 for my family room. One died after a couple of weeks but the other 4 still works fine. The dimming function does not work as well as on a “regular” bulb but the trade offs (less energy consumption & less heat generated) seem worthwhile.

Review by G. Kelley:

I never opened the package, so I cannot attest to the capabilities of this bulb. What surprised and disturbed me was that this was around $[...]. Before purchasing, I checked Sylvania’s website and it said this item #, CF15BR30DIMMABLE3000KBL, came in a package of 6, so when I saw 1-Pack, I assumed 1 pack of 6 (dimmable CFL’s run around $[...] each). I have purchased many CFL bulbs before and this one is outrageously expensive. Check out [...] instead.