20 watt, Edison screw, Length 160 mm, Diameter 46 mm, 3 turn compact tubes. Red 3u, used in some electric fire's used as 5109196.

This Lamp is known as a Compact Fluorescent light bulb, it has a glass tube wound small and coated inside with fluorescent Powder, it has its own starting gear, not like the old lightbulb with a length of tungsten wire across two wires.

Therefore it is known has a discharge lamp.

It was found discharge tubes last far longer than the Tungsten light bulbs and can provide the same colour temperature as a tungsten lamp.

So to date if a Compact lamp can burn 20 watts and produce same light as a 140 watt tungsten incandescent lets give them a go

With any discharge or led lamp there is flicker if used on 50 HZ ac mains.

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