Rated 4.4 out of 5Â by 10
Rated 5 out of 5Â by Matttheelectrician excellent performer
This bulb, as any LED, only makes sense economically if you use it in a lighting application for more than say 6 hours per day. I purchased more than 100 of them for a visitor's center with a lot of expensive artwork to illuminate. The initial 30 bulbs have now been in use for over a year at about 15 hours per day, 7 days a week. The rest have at least 8-10 months on them. NOT ONE has burned out. VERY impressive. I power them off of large 250-750 KVA, 12vac magnetic transformers on track lighting, and recessed cans with individual magnetic transformers. An electronic ballast probably wouldn't work. We used a light meter on the artwork to compare these with the excellent GE Constant Color 50 Watt Halogen MR16 and it put 30-50% more light on the artwork (not on the wall around it) and the Color Rendering was markedly better. One thing to take care about: this LED has a mini fan in it for cooling with the intake near the perimeter all of the way around the face. The opening in the face of the lamp-holder MUST be large enough to NOT block the air intake. I had to use a hydraulic KO set to open many of the lamp-holders. If the fan gets clogged with lint the LED will start to strobe as the PWM board overheats. Blow it out with air ASAP and it will continue to function. Graphing the cost vs. the 50 Watt Halogen bulb showed break even at about a year for us with the electrical savings, and then very substantial savings over the claimed life of the bulb (abt 83$ including 5 replacement halogens over 25k hrs). We have tried numerous LED's and most of them are too dim to do any good. This one actually delivers and surpassed the Halogen. Trips up and down the ladder have significantly been reduced, as has our electrical usage for lighting, and the reduction in heat created (halogens are HOT) that must be removed by the chiller system has to be significant (just hard to quantify). Highly recommend this particular LED!
December 2, 2012
Rated 5 out of 5Â by gswartzl Very bright
I've was an early adopter of expensive, 4 watt MR16 LED that replaced eight 50 watt Halogens in my kitchen and six in my office. I was not happy with the light output, but those were the best available at the time (about 2 years ago).
These 10 watt MR16's are absolutely the brightest I have seen and are comparable to the 50 watt halogens (although the distribution of their light might be a bit less in terms of the primary angle of the light).
I'm very happy with these and plan to order more, replacing those MR16's that are used the most hours per day. In my situation, I believe that will have about a 7 month break even payback.
April 24, 2013
Rated 1 out of 5Â by RETEE Great...if you have the right application
Other reviewers have pointed to the obvious advantages of these lamps and if you can afford their high price tag, go for it. However if you are looking to replace the short-lived, and difficult to replace halogen lamps that are used in underwater fixtures (such as found in ponds), look elsewhere. The "MR16" designation for these lamps only applies to their base configuration and diameter - not mounting height. I tried to replace the lamps in two different pond light fixtures and the height of the lamp did not allow either fixture cover to go back on to seal the unit (not even close). Considering I had to completely destroy the anti-theft packaging to get the bulb out, well, $20 down the drain.
December 19, 2013
Rated 5 out of 5Â by Matttheelectrician very good LED MR16 (Update on Dec 2, 2012 review)
This is an update on the review I wrote on Dec 2, 2012. With over 100 of these in use for 2 - 2 1/2 years I can give some insight into the longevity of this MR16. Only one has failed so far. Very impressive! They are used 15 hours a day, 7 days a week, which adds up to over 11,000 hours. Four are on 24/7 and have been in use for 2 1/2 years so they have been going for 21,900 hours without a break. None of these have failed.
I saw one review where someone tried to put them in a sealed pool light fixture. They absolutely cannot be used for this kind of purpose. The integrated fan HAS to breathe freely! If the track-head that you are using has the UV filter glass in it, you MUST remove it. The LED doesn't emit deteriorating, UV light like the halogen MR16's. I have found it useful to use a can of compressed air (like Dust Off) to blow out the interior of the bulb where the fan is. It is amazing how much air it moves in cooling the bulb, and consequently it builds up a fair bit of dust and lint inside. I have had one bulb's fan totally seize up from this and it began to overheat and strobe. I blew out the dust and the fan started spinning again and it quit strobing, and has been fine since. Running them as long each day as I do, I find that blowing them out every 6 months or so is sufficient,
Also notable, the light output is still good and does not seem to degrade significantly with time like some LED's do. At this point the bulbs have paid for themselves and then saved me money on electricity for over a year. The math shows that I save over $15 per year per bulb on electricity at our rate of roughly 7 cents a kilowatt-hour compared to the 50 watt halogens we were using. [40 (watts saved) x 5475 (hours of usage per year) x .07 (our cost per kilowatt-hour) / 1000]
I can still highly recommend this bulb if you will run it for more than 6 hours a day and will be putting it in a well-ventilated, non-enclosed fixture.
March 26, 2014
Rated 5 out of 5Â by EdMLC great replacement
I started using these to replace old bulbs that get really hot and because of the heat, i've had to replace the ceramic receptacle they plug into. They do not burn as hot and I have not had to replace any receptacles in a year. They also work much better in dimming situations as other tend to pulsate when dimmed.
June 6, 2014