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Sokply 2FT T8 T12 U Shaped LED Tube Light, 15W (36 watts Equivalent) 4000K Cool White, 24IN Led Replacement for U Bend Fluorescent Bulbs, Direct or Ballast Bypass, UL&DLC Listed(1 Pack) :
Lighting-Gallery.net - circline and u-bent fluorescent tubes/USSR Circline lamp. Who made this one?
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U- Bent LED Tube Light, 36W(70W Equivalent), T8 2FT 4900LM High Bright, 6000K Daylight White,G13 Base,Dual-End Powered, Remove Ballast, Clear Cover, Fluorescent Light Tube Replacement (10-Pack) : Amazon.co.uk: Lighting
Eiko Mini Lamps F31T8/841/U 31 watt 4100 K T8 85 CRI U-Bent 1-5/8 Inch Spacer Medium Bi-Pin Fluorescent Lamp | Cooper Electric