Rich, I know this is an old post, but I have to disagree with you on the "flicker" part. ALL LEDs operate on very low voltage, DC current. I think the maximum voltage they can operate with is 5 Volts, but even that may be too much. When plugged into 120V AC house power, that current is converted, by a transformer/capacitor circuit, into low voltage, steady DC power before being delivered to the LED. This essentially eliminates the "on-off" characteristic of AC power that you were speaking of.
Even the LEDs that plug into 12V DC power have current limiting resistors included that prevent them from getting too much Wattage.
- Jack