"Sale" AMATRON 8" T9 LED Circline 11W Cool White 4100K Clear Lens with Non-Dimmable External Power Driver to Replace 8 inch 22W Fluorescent Circline Bulb

I found this product to be all that it was advertised to be. The lamp was shipped with an APC brand constant-current power supply, which in my estimation was the right way to go. One should note however that this power supply is not "instant on", so there may be a couple of second delay between switch activation and lamp illumination. This is a minor quibble however as the lamp is very bright and only uses half the power of the already efficient circline fluorescent lamp it replaced. If I had to ask for anything different it would be for a lower color temperature LED option. The 4100K is just too "cool" for my bedroom application where I installed it in a Hunter fan. It's fine for a bathroom perhaps, but it's a little harsh in other living spaces. I've had the unit around a month now, and so far I am quite satisfied. It seems to be a well-built product.

I retrofitted a fluorescent fixture with a hard to find double circline bulb and ballasts that regularly needed replaced ( ungrounded) with this 8" and a 12" LED circline. It wasn't difficult. Each bulb is shipped with its own AC to DC converter. These could both be hidden in the base of the fixture. The resulting light is "hot" at 4100K -- very bright and a bit "harsh" like an office environment, even under a shade -- but that's just fine for my home office.

Great light, much brighter and clearer than the florescent tube it replaced in my magnifier. A great improvement in the use of the magnifier for my old tired eyes! Bulb fit perfectly right in the fixture and power supply fit nicely in the same housing the ballast used to be in. The directions were pretty sketchy, but I was able to guess the right hookups after a few tries.

Used to replace a florescent bulb in a ceiling fan. The light is bright, very white and generally quite satisfactory. One nuisance is the delay in starting mentioned by other customers. You get used to it, but it's at least a full second from the time you switch until the bulb lights.The other annoyance is that if I turn off the light, but leave the fan running, the bulb blinks on and off at about one-second intervals.Even if I wasn't concerned about what evil this was doing to the electronics, the bulb is bright enough that this is unacceptable, despite being in a sunlit room.

Amatron was efficient at accepting my return. This 8" circular would not fit into my 7 1/2 " ceiling fan space.Too bad, I thought this would be a great energy saver.

I purchased a 12" and 8" Amatron LED Circline (on Nov 4, 2014 for a total of $189.48 including shipping) as a retrofit for an existing fluorescent fixture. I then received a letter from Joan Carucci of Amati International, LLC asking that I review these bulbs. So here goes.First, I'm "off the grid" with a pretty minimal solar power system. Every watt counts, especially in the winter. That's the only way I could justify the exorbitant price of these bulbs. Also, I use an inverter (to convert battery DC voltage to household AC voltage) which only "wakes up" if it senses a load. More on this later.On the plus side, the Amatron LED bulbs are much brighter than the original fluorescent bulbs, so much so that the 12" LED bulb alone would have sufficed to replace both fluorescent bulbs. They're also more efficient: I measured the current draw at about 300 mA total for both bulbs at 120V AC, which works out to about 36 watts. I think the original fluorescent bulbs drew over 50 watts according to their specs (but don't quote me on this).The original fluorescent bulbs "wore out" every few years. They still worked, but they would become very slow to come on in cold weather and often had to be switched on and off multiple times before they'd come on. This was another reason for my decision to upgrade to LED. I was a little disappointed to find that the Amatron LED bulbs don't come on instantly, like the LED bulbs I've used before. It takes about a half second for the 12" bulb to turn on and about a second for the 8" bulb to turn on. This might be temperature dependent; the temperature was about 65 degrees F when I tried it.The installation was straightforward, although the instructions were a little confusing with respect to the DC connections. There's nothing in the written instructions about the DC connections, but if you look closely at the second picture in the "WAY 1: Single LED in one fixture" series it does show them. I didn't notice this and called Amatron customer support; the support representative was excellent. Also, the power supply for the 8" bulb had brown and blue wires for the AC connections instead of black and white as described in the instructions. They were identified on the power supply itself (brown is live, blue is neutral), but the power supply came with a sticker on it that concealed the text.I like the concept of having the power supplies separate from the bulbs. I'm told LED bulbs will typically outlive their power supply, so it should (in theory) be possible to replace the power supplies without replacing the bulbs. The power supplies that came with the bulbs, however, aren't very impressive (slow to turn on). And it would be nice if Amatron sold a single power supply capable of driving both bulbs. This would make the installation easier and would probably be more efficient.Neither of these bulbs by itself is enough to "wake up" my inverter, even at the lowest search setting of 16 watts. I think this has to do with the power supplies; once the bulb comes on, it draws enough to keep the inverter from going back to sleep (but only at the lowest inverter search setting of 16 watts). If the inverter is asleep when I turn the bulb on, however, the initial power draw of the power supply isn't enough to wake the inverter up. So even though the 12" bulb alone provides plenty of light, I ended up using both bulbs to accommodate my inverter's search mode.Overall, I think it's pretty hard to justify the price of these bulbs, but in terms of the light they produce and the power they consume they are superior to the original fluorescent bulbs.

I am very happy with this product.

Easy to install and about 3 times the light.