"Silver Surfer" wrote in message
. ..
Does anyone recall those power saving "discs" for light bulbs they were
selling back during the oil embargo days of the 70's. The disc was placed
in a standard light bulb fixture and the light bulb was screwed in next.
The disc was nothing more than a diode that "saved energy" by blocking
power to the bulb for half of each cycle.

Is anyone still making these things? If so, where can I buy them?

Why would you want one? They save very little energy and greatly reduce the
efficiency of the bulb. If you want to save power, get a compact fluorescent
or use a lower wattage bulb. You'll obtain superior results with either.