I tried the MR16 MasterLED spots several months back and although I loved the light output and power saving, the noise would drive me nuts (we have 6 MR16 in our lounge + 12 or so more in kitchen/dining room).
I suspect the noise is amplified due to having a two story house, with the MR16's in the bottom story roof, which is the floor of the second storey, so little air gap.
So, I've noticed the branding has changed from Master LED to EnduraLED and was wondering if the Fan noise has been reduced (someone told me Philips was developing new quieter fans).
The other question I have is around the Fan life. Working with computers a bit (I'm CIO in our organisation) I know Fans tend to get noisier after 2-3 years, then die in 5. The lights are rated 40,000 hours, which means they should last 15 years or so under normal use, however is this realistic given they have fans?
I understand the GU10 lights don't have fans, I tried these and the output didn't seem to be the same as the MR16 (the MR16 was 10 watts, and the GU10 was 7Watts so understandable). Is there a higher wattage GU10 available? (seems to be only 4watts on the website).
Can try to help answer your questions. Indeed the MR16 10W lamp has higher light output than the GU10 retrofits in our portfolio. This is in line with the Halogen originals: MR16 Halogen (because it is a low voltage Halogen type) has signficantly higher (more than 50%) light output than GU10 Halogen (a mains voltage lamp). Because we want our LED lamps to match their Halogen equivalents closely, you will find higher fluxes in the MR16 range than in the GU10 range for the same wattage equivalence.
This, combined with the fact that MR16 is a smaller lamp than GU10 (and we did not want to go for a long type MR16 because it would not fit in many fixtures), leads to the inevitable conclusion that for MR16 we have to deal with higher wattages and higher heat loads in a smaller volume. If we would not use active cooling, the temperature of the LEDs and driver would go so high that the lamp will last only a short while. With active cooling, using the type of long life fans used in e.g. note books, we can keep the LEDs and drivers cool and guarantee a long life of the product.
The active cooling comes with challenges and draw backs, like the ones pointed out by you: reliability, noise. Indeed, compared to the first actively cooled products we developed, we have made significant steps in lowering the noise levels and also the vibrations that may lead to noise being generated by fixtures or recessed ceilings. For most applications, the noise generated is now lower than 25dBA (sound power level), which leads to library-level noise levels for the user. We have done extensive reliability testing, including testing in dust chambers to assess and guarantee the long life of the product.
Hope this answers your questions at least partly.
Thanks for the info, appreciate you getting back to me.
I appeciate the challenges you have faced, its pretty cool to see the technology develop, it has lots of potential, and other than the noise it was a brillant fit. I've had a look round and there is nothing like this output and at the same cost. It fit just about perfectly in my existing lamp holders (I needed to file some metal bumps out to make it fit snuggly).
Note sure if you can answer this, but here goes
The one I looked at was branded "MasterLED" several months ago, is the dba rating on this the same as the EnduraLED product as I would like to give them another try if the dba rating is lower. I heard from the electrical supplier I used a month or 2 ago, that they heard from the sales rep that a new lamp is coming out with a lower dba rating, do you know when/if this is likely to happen?