Power Functions Light Set LEGO 8870

These are some pretty good LEDs. They are bright and do not use much power. The long wires can be annoying if you are installing the lights in a small train or car, but are good for larger vehicles. The light is still kind of white when you shine them through a colored piece. If possible, lights that shine either white or red depending on which direction you turn the dial/switch would be nice and eliminated the need to change headlight colors when switching directions with trains. A bit expensive, but great overall.

This outputs a really nice soft white light. I used an array of 12 of these LED units to created a 24 LED flashlight powered by a hand crank dynamo which was bright enough so one could read a book at night if the book was about three feet away. With a Lego Education Energy Meter X1, I built a rechargeable Flashlight powering one LED assembly; The Energy Meter was able to power the LEDs from about 9.5 volts to as low as 8.0 Volts. The Energy Meter measured that the LED's current drain at 9 Volts was at .001 Amperes (.009 Watts). The only thing I would change with this particular LED design is the elimination of the black 2x2 brick that is between the wiring connector and the two LED lights - because more often than not the black 2x2 brick was was in my way when I had to do cable management. If I could add something it would be scaleable parabolic reflector to hold one or two LEDs AND a Lego-Power-Function-connector to the Legos-eLabs-connector cable.