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NYLL - 21 Inch/ 21" Plug & Play LED Tube - Warm White (2700K) T8 LED Lamp Directly Relamp 20W Fluorescent Bulb F20T12/21”, F20T12/CW/21” (Without rewiring or Modification) - Ballast Required! - Amazon.com
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Technical Precision Replacement for OSRAM Sylvania DULUX L 36W/21-840 is Compatible with OSRAM Sylvania - Amazon.com
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LEDVANCE | HE 21W/840 | Fluorescent lamp LUMILUX T5 nws FLH1 - Fluorescent lamp 21W 16mm 4000K HE 21W/840 | 4050300591407 | Fluorescent lamp
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Green Creative 12T5HE/3F/840/BYP/R 12 Watt 3-Foot LED T5 Single Ended Bypass Tube Lamp Replaces 21W Fluorescent
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Satco 7 Watt 21" T5 LED Lamp, Ballast Bypass, Miniature Bi-Pin, 4000K | 7W/ LED/T5/840/BP | Bulbs.com
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Green Creative 12T5HE/3F/DIR 12 Watt 3ft LED T5HE Linear Tube Lamp Direct Ballast Compatible Replaces 21W Fluorescent
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