G4 12 high-power SMD LED base, very good bulbs

Goobay, 30334 LED Chip for G4 lamp base
G4-02 / S pin base LED at leds24.com
LUMITRONIX, G4 Downlight 10 LEDs, 1.8W, 12V

Of all the modules, it is the brightest and has thereby still the largest angle and a very pleasant color. The measured input power at 12V supply is 2.2 watts.
As an electronics I have considered me the components used a bit more detail. These are on the cutting edge of technology. Let's hope the time to built the manufacturer of time the newer, brighter LEDs. For this module there is of me 5 stars.

Due to the low price, I plan with the help of several of these module, my old uplight with 300Watt halogen spotlights above and 50 Watt halogen bulb for the reading light to convert from a "heater" in an energy-friendly lighting.

===== ===== Supplement dated 14.10.2011

The conversion is completed (see set photos above). The LED uplight is brighter than the halogen lamps with!
Uplight are certainly among the most pleasant light sources in the living area. They produce a bright light and distribute it without glare in the room.
Here is their energy consumption by approx 300Watt for halogen spotlights and about 50W for the reading lamp (if present) on the negative side.
Regrettably, there are no commercially significant alternatives for uplight with LED's, or they are then too expensive.
I have therefore decided to use a self-construction.

Who has some electronics knowledge, a measuring device and a soldering iron can using
20pieces "G4 12 high-power SMD LED G4 base" modules convert his uplight and thereby save a whopping 300W.

As a treat That said, the modules can be dimmed also!
More information and assembly instructions on "comments" here at Amazon.
Have Fun!

===== ===== Supplement dated 05.02.2013

After the manufacturer has changed the module, the dimming function is only for experienced hobbyists (see assembly instructions).