You are purchasing a high-priced LED Bulbs for Socket Gu5,3. There are significantly cheaper versions, but it's the only one I've found at Amazon which is designed for Gu5,3 and 12V and for which the manufacturer "dimmable" indicates.
I am using now for 7 years different LED bulbs and have been made very different experiences with it. However, they are getting better and in my view now everyone can buy LED bulbs. Unfortunately, the data do not always, in particular for light color and brightness.
++ Light color:
Particularly, the light color of this LED. There are only extremely rarely led bulbs that are as "hot". Specifying 2700K can I fully understand. Ie it actually acts like a light bulb / halogen bulb and has a very pleasant light. It is therefore also recommended for the "cuddle area" in the house. Previously, I had about 10 different LED bulbs allegedly 2700K create only another with the same warm light color.
o illumination:
This light bulb as far as you can see the built 4 individual LED. The light from the LED is lit by a somewhat diffuse cover that diffuses the light somewhat. Nevertheless, it has a fairly strong "spot" effect, I mean that they lit a clearly recognizable and relatively small circle of light bright. Other LED spots with many LED lights distributed over the entire surface of the area evenly. If you do illuminate something or want to have a reading lamp that is ideal. To light a large room with several spots I think this is a disadvantage.
o (++) power consumption (o in comparison with other LED light sources, compared to halogen ++):
The disadvantage of the warm light color and dimming is my view of the LED lamps high power consumption. Other LED lamp with approximately 3.5W appear as bright (which is always somewhat subjective, whiter light shines brighter). But the luminous efficiency is still significantly low for the power consumption.
is this a problem? Of the current costs rather not, but more consumption = more heat = shorter life of the bulb, if necessary. But that's just a Risk and will turn out to kitch time. If an LED (without production errors) is broken, because it has long operated hot.
+ Dimming:
This LED can be dimmed - in contrast to many other LED lamps. However, it is with most dimmers light very quickly. With simple dimmer I have to achieve full brightness in the first 10% of the dimming range and can therefore be difficult to adjust different brightness. I suspect due to their measured properties, that they with most normal dimmers but cooperates everywhere is quite bright even at smaller setting. Can do better dimmers With special LED (see also questions / answers for this bulb).
Benefits of different transformers:
This light bulb has an internal electronic circuit which ensures that the lamp with different voltages (without dimmer) is always the same light. As long as the transformer provides roughly 12V DC it is working fine. In my tests I have between 5V and 16V (short also to 20V) always the same brightness while maintaining performance (5,9W) measured. How do you benefit? While you should not transformer Minimum load> 6W LED needs these really run on each 12V transformer clean with enough power - even if not specifically designed for LED. You will also no differences in brightness only because the lamps are connected to different lengths power lines.
Some technical information about dimming.
LED dimming can be really outstanding. This can be seen on LED stripes that exist with very primitive dimmer for a few Euros (also RGB or RGBW - color mixing is dimming the respective close together liegenen color LED achieved). The dimmer usually turn the power on and off many times per second - so fast that you can see no flicker. The LED is dark when the short pulse is in the turned on the lamp becomes shorter. This is called PWM (pulse width modulation).
The GU5.3 lamps have an internal electrical circuit. This ensures that they can be arbitrarily polarized (+/- pole does not matter) and that they in a typically comfortable with a range of voltages (from 6V here for other conditions have from 10V) can be operated and not burn out when the transformers 13 / 14V supply. Exactly this electrical circuit prevents the dimming. Therefore Dimmable GU5.3 LED lamps need a special circuit to cooperate with PWM dimmers. This is expensive and the reason why most LED can not be dimmed.
Conclusion: If you want to have a LED with warm light color then you will come to this Osram past hardly. If dimming is important, there is little alternative. Depending on the dimmer, the dimming range is very small and the lamp much more quickly "quite light" as halogen bulbs. Otherwise there are eg the bulbs of Fa sebson cheaper alternatives with better light distribution and I would also prefer to engage in the design LED bulbs with 3.5W consumption -. Wg. heat development.
Greeting Mangars
