VOLTAGE RANGE FOR LED LIGHTS

Most LEDs cast a very narrow beam of light. That may be why it seems they don't light the yard as well. This is probably the same reason you are not using LED light bulbs to light your living room right now. (Think about it, the principle is the same). Most white LEDs are rated at 3.2 volts and still shine plenty bright at only 3 volts. They do come in other voltages though. I came across some 6 volt LEDs by mistake. It took some experimenting to figure out the correct voltage. At 3 volts, no light. At 9 volts, burns out. Hmmm.

The main output cone of a "standard" led is about 20 degrees. Incandescent bulbs radiate light in all directions. LED bulbs are good for spot lighting, task lighting and emergency lights--- and for stop/turn lights on cars & trucks as the tight focus "beam" shows up better than an incandescent.