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4 Easy Ways to Change a Circular Fluorescent Light Bulb - wikiHow
40 watt T9 Circular Fluorescent Tube Colour 840 Cool White
PYXEL STUDIO Fluorescent 12" Circular Ring Light Bulb Round Tube 40w 5500k Daylight Colour Temperature 4 Pin T6 Light Lamp Replacement Spare: Amazon.co.uk: Electronics & Photo
T9 LED Circline Light Bulb 12 inch, 16W 6000K 1920LM, 9" LED Circular Tube Light, Replacement for Fluorescent Lamp Fixture FC12T9 (Ballast Must be Removed Or Bypassed) : Amazon.co.uk: Lighting
4 Easy Ways to Change a Circular Fluorescent Light Bulb - wikiHow