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60 watt T9 Circular Fluorescent Tube Colour 840 Cool White
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Circular Fluorescent Bulbs - Manufacturer, Supplier, Exporter
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
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60w Circular Fluorescent Fitting with Large Glass | Fitzgerald (SF60/21)
40W Circular Fluorescent Tube T5 Warm White | 300mm Dia
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Vintage Circline 32 & 22 watt Fluorescent Fixture - YouTube
