Inside a tungsten moonflower disco light.

A look inside a common retro disco light, and how it uses a single lamp to generate lots of sharp beams of light that can either be static as in this unit, or rotate to the beat.
Although very inefficient, these simple lights put out lots of very sharp beams of light, so they dominated the cheaper end of the disco market for decades.

I was a bit under the weather while recording this video, so I may sound a bit hoarse.

I meant to say "Safety Extra Low Voltage Equivalent" (SELV-equiv) when I described the electronic halogen transformer. (Also known as Separated Extra Low Voltage Equivalent.)

The simplest way to understand the operation of this effect is to imagine that from various positions in the room, looking through the lens will show a reflection of the lamp's filament in one of the many small mirrors. (Don't actually look directly into high intensity light beams though.)

The reference to the capacitor stopping the power supply from blowing up is the tendency of the circuitry to become more sensitive to mains transients when hot. Extra external filtering was often added for electrical noise reduction to limit emitted noise and also try and reduce the risk of power supply failure.

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