Science technology, light bulb, Macro shots light bulb filament, clear domestic mains light bulb against black background, side lit with soft pink light, switches on and off, dimming and bightning slowly, Close up of filament switching on and off, focus pulls, BCU track along filament, support wires glowing, filament dimming and bricghtebning, VBCU of filament showing coils within main coil, fillament loosing heat to support wires
Filmed by David Spears
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