Touch Lamps

[Matheous-2]

How do they work & how can they come on by themselves??

[Old_Geezer]

It'll most likely being able to detect your hand because of the capacitive change effect it has on the circuit, when it is in close proximity.

Coming on by itself seems a failure, isn't it ?

[woofgang]

they work by identifying a change in the power flow...like an RCD circuit breaker...I guess that dust, especially if it has a metallic content, might do the same thing

[AlBags]

An absolute miracle isn't it!? : )