[js1138]

I think it was Arthur Clarke who wrote a story about the endarkening bulb that cancelled light. Obviously the work of an engineer.

I could be confusing this with his story about the noise cancelling device. I wonder if Bose is paying him royalties on their headphones.

[longshadow]

..... endarkening bulb that cancelled light.

Technology is on the march: the device to which you allude has been replaced by the "Dark-emitting diode"....

;-)