Fluorescent bulbs have an advantage in that they are more energy-efficient than conventional bulbs. On this light bulb you'll find a G13 socket.
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Osram Fluorescent Light L 30 Watt 865 Daylight 30 W
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Osram 30W T8 Fluorescent Tube 900mm 3FT Daylight - 518015
Big on Electricals
Osram 30W T8 Fluorescent Tube 900mm 3FT Daylight - 518015